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718 lines
17 KiB
Plaintext
718 lines
17 KiB
Plaintext
drop table if exists t1,t2;
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set @sav_dpi= @@div_precision_increment;
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set div_precision_increment= 5;
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show variables like 'div_precision_increment';
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Variable_name Value
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div_precision_increment 5
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create table t1 (product varchar(32), country_id int not null, year int, profit int);
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insert into t1 values ( 'Computer', 2,2000, 1200),
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( 'TV', 1, 1999, 150),
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( 'Calculator', 1, 1999,50),
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( 'Computer', 1, 1999,1500),
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( 'Computer', 1, 2000,1500),
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( 'TV', 1, 2000, 150),
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( 'TV', 2, 2000, 100),
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( 'TV', 2, 2000, 100),
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( 'Calculator', 1, 2000,75),
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( 'Calculator', 2, 2000,75),
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( 'TV', 1, 1999, 100),
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( 'Computer', 1, 1999,1200),
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( 'Computer', 2, 2000,1500),
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( 'Calculator', 2, 2000,75),
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( 'Phone', 3, 2003,10)
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;
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create table t2 (country_id int primary key, country char(20) not null);
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insert into t2 values (1, 'USA'),(2,'India'), (3,'Finland');
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select product, sum(profit) from t1 group by product;
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product sum(profit)
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Calculator 275
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Computer 6900
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Phone 10
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TV 600
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select product, sum(profit) from t1 group by product with rollup;
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product sum(profit)
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Calculator 275
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Computer 6900
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Phone 10
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TV 600
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NULL 7785
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select product, sum(profit) from t1 group by 1 with rollup;
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product sum(profit)
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Calculator 275
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Computer 6900
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Phone 10
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TV 600
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NULL 7785
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select product, sum(profit),avg(profit) from t1 group by product with rollup;
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product sum(profit) avg(profit)
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Calculator 275 68.75000
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Computer 6900 1380.00000
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Phone 10 10.00000
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TV 600 120.00000
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NULL 7785 519.00000
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year;
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product country_id year sum(profit)
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Calculator 1 1999 50
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Calculator 1 2000 75
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Calculator 2 2000 150
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Computer 1 1999 2700
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Computer 1 2000 1500
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Computer 2 2000 2700
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Phone 3 2003 10
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TV 1 1999 250
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TV 1 2000 150
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TV 2 2000 200
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup;
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product country_id year sum(profit)
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Calculator 1 1999 50
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Calculator 1 2000 75
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Calculator 1 NULL 125
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Calculator 2 2000 150
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Calculator 2 NULL 150
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Calculator NULL NULL 275
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Computer 1 1999 2700
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Computer 1 2000 1500
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Computer 1 NULL 4200
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Computer 2 2000 2700
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Computer 2 NULL 2700
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Computer NULL NULL 6900
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Phone 3 2003 10
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Phone 3 NULL 10
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Phone NULL NULL 10
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TV 1 1999 250
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TV 1 2000 150
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TV 1 NULL 400
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TV 2 2000 200
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TV 2 NULL 200
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TV NULL NULL 600
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NULL NULL NULL 7785
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explain extended select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 15 100.00 Using filesort
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Warnings:
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Note 1003 select `test`.`t1`.`product` AS `product`,`test`.`t1`.`country_id` AS `country_id`,`test`.`t1`.`year` AS `year`,sum(`test`.`t1`.`profit`) AS `sum(profit)` from `test`.`t1` group by `test`.`t1`.`product`,`test`.`t1`.`country_id`,`test`.`t1`.`year` with rollup
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select product, country_id , sum(profit) from t1 group by product desc, country_id with rollup;
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product country_id sum(profit)
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TV 1 400
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TV 2 200
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TV NULL 600
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Phone 3 10
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Phone NULL 10
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Computer 1 4200
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Computer 2 2700
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Computer NULL 6900
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Calculator 1 125
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Calculator 2 150
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Calculator NULL 275
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NULL NULL 7785
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup limit 5;
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product country_id year sum(profit)
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Calculator 1 1999 50
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Calculator 1 2000 75
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Calculator 1 NULL 125
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Calculator 2 2000 150
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Calculator 2 NULL 150
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup limit 3,3;
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product country_id year sum(profit)
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Calculator 2 2000 150
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Calculator 2 NULL 150
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Calculator NULL NULL 275
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select product, country_id, count(*), count(distinct year) from t1 group by product, country_id;
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product country_id count(*) count(distinct year)
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Calculator 1 2 2
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Calculator 2 2 1
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Computer 1 3 2
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Computer 2 2 1
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Phone 3 1 1
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TV 1 3 2
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TV 2 2 1
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select product, country_id, count(*), count(distinct year) from t1 group by product, country_id with rollup;
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product country_id count(*) count(distinct year)
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Calculator 1 2 2
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Calculator 2 2 1
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Calculator NULL 4 2
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Computer 1 3 2
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Computer 2 2 1
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Computer NULL 5 2
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Phone 3 1 1
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Phone NULL 1 1
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TV 1 3 2
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TV 2 2 1
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TV NULL 5 2
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NULL NULL 15 3
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup having country_id = 1;
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product country_id year sum(profit)
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Calculator 1 1999 50
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Calculator 1 2000 75
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Calculator 1 NULL 125
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Computer 1 1999 2700
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Computer 1 2000 1500
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Computer 1 NULL 4200
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TV 1 1999 250
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TV 1 2000 150
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TV 1 NULL 400
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup having sum(profit) > 200;
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product country_id year sum(profit)
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Calculator NULL NULL 275
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Computer 1 1999 2700
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Computer 1 2000 1500
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Computer 1 NULL 4200
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Computer 2 2000 2700
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Computer 2 NULL 2700
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Computer NULL NULL 6900
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TV 1 1999 250
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TV 1 NULL 400
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TV NULL NULL 600
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NULL NULL NULL 7785
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup having sum(profit) > 7000;
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product country_id year sum(profit)
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NULL NULL NULL 7785
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select concat(product,':',country_id) as 'prod', concat(":",year,":") as 'year',1+1, sum(profit)/count(*) from t1 group by 1,2 with rollup;
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prod year 1+1 sum(profit)/count(*)
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Calculator:1 :1999: 2 50.00000
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Calculator:1 :2000: 2 75.00000
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Calculator:1 NULL 2 62.50000
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Calculator:2 :2000: 2 75.00000
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Calculator:2 NULL 2 75.00000
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Computer:1 :1999: 2 1350.00000
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Computer:1 :2000: 2 1500.00000
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Computer:1 NULL 2 1400.00000
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Computer:2 :2000: 2 1350.00000
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Computer:2 NULL 2 1350.00000
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Phone:3 :2003: 2 10.00000
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Phone:3 NULL 2 10.00000
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TV:1 :1999: 2 125.00000
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TV:1 :2000: 2 150.00000
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TV:1 NULL 2 133.33333
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TV:2 :2000: 2 100.00000
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TV:2 NULL 2 100.00000
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NULL NULL 2 519.00000
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select product, sum(profit)/count(*) from t1 group by product with rollup;
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product sum(profit)/count(*)
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Calculator 68.75000
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Computer 1380.00000
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Phone 10.00000
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TV 120.00000
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NULL 519.00000
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select left(product,4) as prod, sum(profit)/count(*) from t1 group by prod with rollup;
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prod sum(profit)/count(*)
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Calc 68.75000
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Comp 1380.00000
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Phon 10.00000
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TV 120.00000
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NULL 519.00000
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select concat(product,':',country_id), 1+1, sum(profit)/count(*) from t1 group by concat(product,':',country_id) with rollup;
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concat(product,':',country_id) 1+1 sum(profit)/count(*)
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Calculator:1 2 62.50000
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Calculator:2 2 75.00000
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Computer:1 2 1400.00000
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Computer:2 2 1350.00000
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Phone:3 2 10.00000
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TV:1 2 133.33333
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TV:2 2 100.00000
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NULL 2 519.00000
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select product, country , year, sum(profit) from t1,t2 where t1.country_id=t2.country_id group by product, country, year with rollup;
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product country year sum(profit)
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Calculator India 2000 150
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Calculator India NULL 150
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Calculator USA 1999 50
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Calculator USA 2000 75
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Calculator USA NULL 125
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Calculator NULL NULL 275
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Computer India 2000 2700
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Computer India NULL 2700
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Computer USA 1999 2700
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Computer USA 2000 1500
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Computer USA NULL 4200
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Computer NULL NULL 6900
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Phone Finland 2003 10
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Phone Finland NULL 10
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Phone NULL NULL 10
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TV India 2000 200
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TV India NULL 200
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TV USA 1999 250
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TV USA 2000 150
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TV USA NULL 400
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TV NULL NULL 600
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NULL NULL NULL 7785
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select product, `sum` from (select product, sum(profit) as 'sum' from t1 group by product with rollup) as tmp where product is null;
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product sum
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NULL 7785
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select product from t1 where exists (select product, country_id , sum(profit) from t1 as t2 where t1.product=t2.product group by product, country_id with rollup having sum(profit) > 6000);
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product
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Computer
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Computer
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Computer
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Computer
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Computer
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year having country_id is NULL;
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product country_id year sum(profit)
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select concat(':',product,':'), sum(profit),avg(profit) from t1 group by product with rollup;
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concat(':',product,':') sum(profit) avg(profit)
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:Calculator: 275 68.75000
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:Computer: 6900 1380.00000
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:Phone: 10 10.00000
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:TV: 600 120.00000
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NULL 7785 519.00000
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with cube;
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ERROR 42000: This version of MySQL doesn't yet support 'CUBE'
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explain select product, country_id , year, sum(profit) from t1 group by product, country_id, year with cube;
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ERROR 42000: This version of MySQL doesn't yet support 'CUBE'
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select product, country_id , year, sum(profit) from t1 group by product, country_id, year with cube union all select product, country_id , year, sum(profit) from t1 group by product, country_id, year with rollup;
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ERROR 42000: This version of MySQL doesn't yet support 'CUBE'
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drop table t1,t2;
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CREATE TABLE t1 (i int);
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INSERT INTO t1 VALUES(100);
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CREATE TABLE t2 (i int);
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INSERT INTO t2 VALUES (100),(200);
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SELECT i, COUNT(*) FROM t1 GROUP BY i WITH ROLLUP;
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i COUNT(*)
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100 1
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NULL 1
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SELECT t1.i, t2.i, COUNT(*) FROM t1,t2 GROUP BY t1.i,t2.i WITH ROLLUP;
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i i COUNT(*)
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100 100 1
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100 200 1
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100 NULL 2
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NULL NULL 2
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drop table t1,t2;
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CREATE TABLE user_day(
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user_id INT NOT NULL,
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date DATE NOT NULL,
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UNIQUE INDEX user_date (user_id, date)
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);
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INSERT INTO user_day VALUES
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(1, '2004-06-06' ),
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(1, '2004-06-07' ),
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(2, '2004-06-06' );
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SELECT
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d.date AS day,
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COUNT(d.user_id) as sample,
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COUNT(next_day.user_id) AS not_cancelled
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FROM user_day d
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LEFT JOIN user_day next_day
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ON next_day.user_id=d.user_id AND
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next_day.date= DATE_ADD( d.date, interval 1 day )
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GROUP BY day;
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day sample not_cancelled
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2004-06-06 2 1
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2004-06-07 1 0
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SELECT
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d.date AS day,
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COUNT(d.user_id) as sample,
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COUNT(next_day.user_id) AS not_cancelled
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FROM user_day d
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LEFT JOIN user_day next_day
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ON next_day.user_id=d.user_id AND
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next_day.date= DATE_ADD( d.date, interval 1 day )
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GROUP BY day
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WITH ROLLUP;
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day sample not_cancelled
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2004-06-06 2 1
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2004-06-07 1 0
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NULL 3 1
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DROP TABLE user_day;
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CREATE TABLE t1 (a int, b int);
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INSERT INTO t1 VALUES
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(1,4),
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(2,2), (2,2),
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(4,1), (4,1), (4,1), (4,1),
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(2,1), (2,1);
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SELECT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b)
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4
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6
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4
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14
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SELECT DISTINCT SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b)
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4
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6
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14
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SELECT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(DISTINCT b)
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4 1
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6 2
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4 1
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14 3
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SELECT DISTINCT SUM(b), COUNT(DISTINCT b) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(DISTINCT b)
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4 1
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6 2
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14 3
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SELECT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(*)
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4 1
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6 4
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4 4
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14 9
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SELECT DISTINCT SUM(b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(*)
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4 1
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6 4
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4 4
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14 9
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SELECT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(DISTINCT b) COUNT(*)
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4 1 1
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6 2 4
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4 1 4
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14 3 9
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SELECT DISTINCT SUM(b), COUNT(DISTINCT b), COUNT(*) FROM t1
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GROUP BY a WITH ROLLUP;
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SUM(b) COUNT(DISTINCT b) COUNT(*)
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4 1 1
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6 2 4
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4 1 4
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14 3 9
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SELECT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
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a sum(b)
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1 4
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1 4
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2 2
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2 4
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2 6
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4 4
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4 4
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NULL 14
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SELECT DISTINCT a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
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a sum(b)
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1 4
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2 2
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2 4
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2 6
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4 4
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NULL 14
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SELECT b, a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
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b a sum(b)
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4 1 4
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NULL 1 4
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1 2 2
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2 2 4
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NULL 2 6
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1 4 4
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NULL 4 4
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NULL NULL 14
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SELECT DISTINCT b,a, sum(b) FROM t1 GROUP BY a,b WITH ROLLUP;
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b a sum(b)
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4 1 4
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NULL 1 4
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1 2 2
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2 2 4
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NULL 2 6
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1 4 4
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NULL 4 4
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NULL NULL 14
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ALTER TABLE t1 ADD COLUMN c INT;
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SELECT a,b,sum(c) FROM t1 GROUP BY a,b,c WITH ROLLUP;
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a b sum(c)
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1 4 NULL
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1 4 NULL
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1 NULL NULL
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2 1 NULL
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2 1 NULL
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2 2 NULL
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2 2 NULL
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2 NULL NULL
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4 1 NULL
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4 1 NULL
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4 NULL NULL
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NULL NULL NULL
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SELECT distinct a,b,sum(c) FROM t1 GROUP BY a,b,c WITH ROLLUP;
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a b sum(c)
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1 4 NULL
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1 NULL NULL
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2 1 NULL
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2 2 NULL
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2 NULL NULL
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4 1 NULL
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4 NULL NULL
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NULL NULL NULL
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DROP TABLE t1;
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CREATE TABLE t1 (a int, b int);
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INSERT INTO t1 VALUES
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(1,4),
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(2,2), (2,2),
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(4,1), (4,1), (4,1), (4,1),
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(2,1), (2,1);
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SELECT a, SUM(b) FROM t1 GROUP BY a WITH ROLLUP LIMIT 1;
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a SUM(b)
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1 4
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SELECT SQL_CALC_FOUND_ROWS a, SUM(b) FROM t1 GROUP BY a WITH ROLLUP LIMIT 1;
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a SUM(b)
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1 4
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DROP TABLE t1;
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CREATE TABLE t1 (a int(11) NOT NULL);
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INSERT INTO t1 VALUES (1),(2);
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SELECT a, SUM(a) m FROM t1 GROUP BY a WITH ROLLUP;
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a m
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1 1
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2 2
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NULL 3
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SELECT * FROM ( SELECT a, SUM(a) m FROM t1 GROUP BY a WITH ROLLUP ) t2;
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a m
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1 1
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2 2
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NULL 3
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DROP TABLE t1;
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set div_precision_increment= @sav_dpi;
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CREATE TABLE t1 (a int(11));
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INSERT INTO t1 VALUES (1),(2);
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SELECT a, SUM(a), SUM(a)+1 FROM (SELECT a FROM t1 UNION select 2) d
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GROUP BY a;
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a SUM(a) SUM(a)+1
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1 1 2
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2 2 3
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SELECT a, SUM(a), SUM(a)+1 FROM (SELECT a FROM t1 UNION select 2) d
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GROUP BY a WITH ROLLUP;
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a SUM(a) SUM(a)+1
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1 1 2
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2 2 3
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NULL 3 4
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SELECT a, SUM(a), SUM(a)+1 FROM (SELECT 1 a UNION select 2) d
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GROUP BY a;
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a SUM(a) SUM(a)+1
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1 1 2
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2 2 3
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SELECT a, SUM(a), SUM(a)+1 FROM (SELECT 1 a UNION select 2) d
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GROUP BY a WITH ROLLUP;
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a SUM(a) SUM(a)+1
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1 1 2
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2 2 3
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NULL 3 4
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SELECT a, SUM(a), SUM(a)+1, CONCAT(SUM(a),'x'), SUM(a)+SUM(a), SUM(a)
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FROM (SELECT 1 a, 2 b UNION SELECT 2,3 UNION SELECT 5,6 ) d
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GROUP BY a WITH ROLLUP;
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a SUM(a) SUM(a)+1 CONCAT(SUM(a),'x') SUM(a)+SUM(a) SUM(a)
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1 1 2 1x 2 1
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2 2 3 2x 4 2
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5 5 6 5x 10 5
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NULL 8 9 8x 16 8
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DROP TABLE t1;
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CREATE TABLE t1 (a int(11));
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INSERT INTO t1 VALUES (1),(2);
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SELECT a, a+1, SUM(a) FROM t1 GROUP BY a WITH ROLLUP;
|
|
a a+1 SUM(a)
|
|
1 2 1
|
|
2 3 2
|
|
NULL NULL 3
|
|
SELECT a+1 FROM t1 GROUP BY a WITH ROLLUP;
|
|
a+1
|
|
2
|
|
3
|
|
NULL
|
|
SELECT a+SUM(a) FROM t1 GROUP BY a WITH ROLLUP;
|
|
a+SUM(a)
|
|
2
|
|
4
|
|
NULL
|
|
SELECT a, a+1 as b FROM t1 GROUP BY a WITH ROLLUP HAVING b > 2;
|
|
a b
|
|
2 3
|
|
SELECT a, a+1 as b FROM t1 GROUP BY a WITH ROLLUP HAVING a IS NULL;
|
|
a b
|
|
NULL NULL
|
|
SELECT a, a+1 as b FROM t1 GROUP BY a WITH ROLLUP HAVING b IS NULL;
|
|
a b
|
|
NULL NULL
|
|
SELECT IFNULL(a, 'TEST') FROM t1 GROUP BY a WITH ROLLUP;
|
|
IFNULL(a, 'TEST')
|
|
1
|
|
2
|
|
TEST
|
|
CREATE TABLE t2 (a int, b int);
|
|
INSERT INTO t2 VALUES
|
|
(1,4),
|
|
(2,2), (2,2),
|
|
(4,1), (4,1), (4,1), (4,1),
|
|
(2,1), (2,1);
|
|
SELECT a,b,SUM(b) FROM t2 GROUP BY a,b WITH ROLLUP;
|
|
a b SUM(b)
|
|
1 4 4
|
|
1 NULL 4
|
|
2 1 2
|
|
2 2 4
|
|
2 NULL 6
|
|
4 1 4
|
|
4 NULL 4
|
|
NULL NULL 14
|
|
SELECT a,b,SUM(b), a+b as c FROM t2
|
|
GROUP BY a,b WITH ROLLUP HAVING c IS NULL;
|
|
a b SUM(b) c
|
|
1 NULL 4 NULL
|
|
2 NULL 6 NULL
|
|
4 NULL 4 NULL
|
|
NULL NULL 14 NULL
|
|
SELECT IFNULL(a, 'TEST'), COALESCE(b, 'TEST') FROM t2
|
|
GROUP BY a, b WITH ROLLUP;
|
|
IFNULL(a, 'TEST') COALESCE(b, 'TEST')
|
|
1 4
|
|
1 TEST
|
|
2 1
|
|
2 2
|
|
2 TEST
|
|
4 1
|
|
4 TEST
|
|
TEST TEST
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1 (a INT(10) NOT NULL, b INT(10) NOT NULL);
|
|
INSERT INTO t1 VALUES (1, 1);
|
|
INSERT INTO t1 VALUES (1, 2);
|
|
SELECT a, b, a AS c, COUNT(*) AS count FROM t1 GROUP BY a, b, c WITH ROLLUP;
|
|
a b c count
|
|
1 1 1 1
|
|
1 1 NULL 1
|
|
1 2 1 1
|
|
1 2 NULL 1
|
|
1 NULL NULL 2
|
|
NULL NULL NULL 2
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a int(11) NOT NULL);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
SELECT * FROM (SELECT a, a + 1, COUNT(*) FROM t1 GROUP BY a WITH ROLLUP) t;
|
|
a a + 1 COUNT(*)
|
|
1 2 1
|
|
2 3 1
|
|
NULL NULL 2
|
|
SELECT * FROM (SELECT a, LENGTH(a), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP) t;
|
|
a LENGTH(a) COUNT(*)
|
|
1 1 1
|
|
2 1 1
|
|
NULL NULL 2
|
|
DROP TABLE t1;
|
|
create table t1 ( a varchar(9), b int );
|
|
insert into t1 values('a',1),(null,2);
|
|
select a, max(b) from t1 group by a with rollup;
|
|
a max(b)
|
|
NULL 2
|
|
a 1
|
|
NULL 2
|
|
select distinct a, max(b) from t1 group by a with rollup;
|
|
a max(b)
|
|
NULL 2
|
|
a 1
|
|
drop table t1;
|
|
create table t1 (a varchar(22) not null , b int);
|
|
insert into t1 values ("2006-07-01 21:30", 1), ("2006-07-01 23:30", 10);
|
|
select left(a,10), a, sum(b) from t1 group by 1,2 with rollup;
|
|
left(a,10) a sum(b)
|
|
2006-07-01 2006-07-01 21:30 1
|
|
2006-07-01 2006-07-01 23:30 10
|
|
2006-07-01 NULL 11
|
|
NULL NULL 11
|
|
select left(a,10) x, a, sum(b) from t1 group by x,a with rollup;
|
|
x a sum(b)
|
|
2006-07-01 2006-07-01 21:30 1
|
|
2006-07-01 2006-07-01 23:30 10
|
|
2006-07-01 NULL 11
|
|
NULL NULL 11
|
|
drop table t1;
|
|
CREATE TABLE t1 (a int, b int);
|
|
INSERT INTO t1
|
|
VALUES (2,10),(3,30),(2,40),(1,10),(2,30),(1,20),(2,10);
|
|
SELECT a, SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
|
|
a SUM(b)
|
|
1 30
|
|
2 90
|
|
3 30
|
|
NULL 150
|
|
SELECT DISTINCT a, SUM(b) FROM t1 GROUP BY a WITH ROLLUP;
|
|
a SUM(b)
|
|
1 30
|
|
2 90
|
|
3 30
|
|
NULL 150
|
|
SELECT a, b, COUNT(*) FROM t1 GROUP BY a,b WITH ROLLUP;
|
|
a b COUNT(*)
|
|
1 10 1
|
|
1 20 1
|
|
1 NULL 2
|
|
2 10 2
|
|
2 30 1
|
|
2 40 1
|
|
2 NULL 4
|
|
3 30 1
|
|
3 NULL 1
|
|
NULL NULL 7
|
|
SELECT DISTINCT a, b, COUNT(*) FROM t1 GROUP BY a,b WITH ROLLUP;
|
|
a b COUNT(*)
|
|
1 10 1
|
|
1 20 1
|
|
1 NULL 2
|
|
2 10 2
|
|
2 30 1
|
|
2 40 1
|
|
2 NULL 4
|
|
3 30 1
|
|
3 NULL 1
|
|
NULL NULL 7
|
|
SELECT 'x', a, SUM(b) FROM t1 GROUP BY 1,2 WITH ROLLUP;
|
|
x a SUM(b)
|
|
x 1 30
|
|
x 2 90
|
|
x 3 30
|
|
x NULL 150
|
|
NULL NULL 150
|
|
SELECT DISTINCT 'x', a, SUM(b) FROM t1 GROUP BY 1,2 WITH ROLLUP;
|
|
x a SUM(b)
|
|
x 1 30
|
|
x 2 90
|
|
x 3 30
|
|
x NULL 150
|
|
NULL NULL 150
|
|
SELECT DISTINCT 'x', a, SUM(b) FROM t1 GROUP BY 1,2 WITH ROLLUP;
|
|
x a SUM(b)
|
|
x 1 30
|
|
x 2 90
|
|
x 3 30
|
|
x NULL 150
|
|
NULL NULL 150
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1(id int, type char(1));
|
|
INSERT INTO t1 VALUES
|
|
(1,"A"),(2,"C"),(3,"A"),(4,"A"),(5,"B"),
|
|
(6,"B"),(7,"A"),(8,"C"),(9,"A"),(10,"C");
|
|
CREATE VIEW v1 AS SELECT * FROM t1;
|
|
SELECT type FROM t1 GROUP BY type WITH ROLLUP;
|
|
type
|
|
A
|
|
B
|
|
C
|
|
NULL
|
|
SELECT type FROM v1 GROUP BY type WITH ROLLUP;
|
|
type
|
|
A
|
|
B
|
|
C
|
|
NULL
|
|
EXPLAIN SELECT type FROM v1 GROUP BY type WITH ROLLUP;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using filesort
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a int(11) NOT NULL);
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
CREATE VIEW v1 AS
|
|
SELECT a, LENGTH(a), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP;
|
|
DESC v1;
|
|
Field Type Null Key Default Extra
|
|
a bigint(11) YES NULL
|
|
LENGTH(a) bigint(10) YES NULL
|
|
COUNT(*) bigint(21) NO 0
|
|
SELECT * FROM v1;
|
|
a LENGTH(a) COUNT(*)
|
|
1 1 1
|
|
2 1 1
|
|
NULL NULL 2
|
|
DROP VIEW v1;
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a int, KEY (a));
|
|
INSERT INTO t1 VALUES (3), (1), (4), (1), (3), (1), (1);
|
|
SELECT * FROM (SELECT a, SUM(a) FROM t1 GROUP BY a WITH ROLLUP) as t;
|
|
a SUM(a)
|
|
1 4
|
|
3 6
|
|
4 4
|
|
NULL 14
|
|
DROP TABLE t1;
|