mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
199 lines
5.6 KiB
Plaintext
199 lines
5.6 KiB
Plaintext
drop table if exists t1, t2;
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create table t1 (grp int, a bigint unsigned, c char(10) not null, d char(10) not null);
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insert into t1 values (1,1,"a","a");
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insert into t1 values (2,2,"b","a");
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insert into t1 values (2,3,"c","b");
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insert into t1 values (3,4,"E","a");
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insert into t1 values (3,5,"C","b");
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insert into t1 values (3,6,"D","b");
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insert into t1 values (3,7,"d","d");
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insert into t1 values (3,8,"d","d");
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insert into t1 values (3,9,"D","c");
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select grp,group_concat(c) from t1 group by grp;
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grp group_concat(c)
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1 a
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2 b,c
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3 E,C,D,d,d,D
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select grp,group_concat(a,c) from t1 group by grp;
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grp group_concat(a,c)
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1 1a
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2 2b,3c
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3 4E,5C,6D,7d,8d,9D
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select grp,group_concat("(",a,":",c,")") from t1 group by grp;
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grp group_concat("(",a,":",c,")")
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1 (1:a)
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2 (2:b),(3:c)
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3 (4:E),(5:C),(6:D),(7:d),(8:d),(9:D)
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select grp,group_concat(c separator ",") from t1 group by grp;
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grp group_concat(c separator ",")
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1 a
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2 b,c
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3 E,C,D,d,d,D
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select grp,group_concat(c separator "---->") from t1 group by grp;
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grp group_concat(c separator "---->")
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1 a
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2 b---->c
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3 E---->C---->D---->d---->d---->D
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select grp,group_concat(c order by c) from t1 group by grp;
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grp group_concat(c order by c)
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by c desc) from t1 group by grp;
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grp group_concat(c order by c desc)
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1 a
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2 c,b
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3 E,D,d,d,D,C
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select grp,group_concat(d order by a) from t1 group by grp;
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grp group_concat(d order by a)
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1 a
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2 a,b
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3 a,b,b,d,d,c
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select grp,group_concat(d order by a desc) from t1 group by grp;
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grp group_concat(d order by a desc)
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1 a
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2 b,a
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3 c,d,d,b,b,a
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select grp,group_concat(a order by a,d+c) from t1 group by grp;
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grp group_concat(a order by a,d+c)
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1 1
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2 2,3
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3 4,5,6,7,8,9
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select grp,group_concat(c order by 1) from t1 group by grp;
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grp group_concat(c order by 1)
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by "c") from t1 group by grp;
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grp group_concat(c order by "c")
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(distinct c order by c) from t1 group by grp;
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grp group_concat(distinct c order by c)
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1 a
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2 b,c
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3 C,D,E
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select grp,group_concat(distinct c order by c desc) from t1 group by grp;
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grp group_concat(distinct c order by c desc)
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1 a
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2 c,b
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3 E,D,C
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select grp,group_concat(c order by c separator ",") from t1 group by grp;
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grp group_concat(c order by c separator ",")
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by c desc separator ",") from t1 group by grp;
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grp group_concat(c order by c desc separator ",")
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1 a
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2 c,b
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3 E,D,d,d,D,C
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select grp,group_concat(distinct c order by c separator ",") from t1 group by grp;
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grp group_concat(distinct c order by c separator ",")
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1 a
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2 b,c
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3 C,D,E
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select grp,group_concat(distinct c order by c desc separator ",") from t1 group by grp;
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grp group_concat(distinct c order by c desc separator ",")
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1 a
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2 c,b
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3 E,D,C
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select grp,group_concat(c order by grp desc) from t1 group by grp order by grp;
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grp group_concat(c order by grp desc)
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1 a
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2 c,b
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3 D,d,d,D,C,E
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select grp, group_concat(a separator "")+0 from t1 group by grp;
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grp group_concat(a separator "")+0
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1 1
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2 23
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3 456789
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select grp, group_concat(a separator "")+0.0 from t1 group by grp;
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grp group_concat(a separator "")+0.0
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1 1.0
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2 23.0
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3 456789.0
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select grp, ROUND(group_concat(a separator "")) from t1 group by grp;
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grp ROUND(group_concat(a separator ""))
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1 1
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2 23
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3 456789
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drop table t1;
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create table t1 (grp int, c char(10));
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insert into t1 values (1,NULL);
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insert into t1 values (2,"b");
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insert into t1 values (2,NULL);
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insert into t1 values (3,"E");
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insert into t1 values (3,NULL);
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insert into t1 values (3,"D");
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insert into t1 values (3,NULL);
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insert into t1 values (3,NULL);
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insert into t1 values (3,"D");
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insert into t1 values (4,"");
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insert into t1 values (5,NULL);
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select grp,group_concat(c order by c) from t1 group by grp;
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grp group_concat(c order by c)
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1 NULL
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2 b
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3 D,D,E
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4
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5 NULL
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set group_concat_max_len = 5;
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select grp,group_concat(c) from t1 group by grp;
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grp group_concat(c)
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1 NULL
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2 b
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3 D,D,E
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4
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5 NULL
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Warnings:
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Warning 1259 1 line(s) was(were) cut by group_concat()
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show warnings;
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Level Code Message
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Warning 1259 1 line(s) was(were) cut by group_concat()
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set group_concat_max_len = 1024;
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select group_concat(sum(a)) from t1 group by grp;
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ERROR HY000: Invalid use of group function
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select grp,group_concat(c order by 2) from t1 group by grp;
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ERROR 42S22: Unknown column '2' in 'group statement'
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drop table t1;
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create table t1 ( URL_ID int(11), URL varchar(80));
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create table t2 ( REQ_ID int(11), URL_ID int(11));
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insert into t1 values (4,'www.host.com'), (5,'www.google.com'),(5,'www.help.com');
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insert into t2 values (1,4), (5,4), (5,5);
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select REQ_ID, Group_Concat(URL) as URL from t1, t2 where
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t2.URL_ID = t1.URL_ID group by REQ_ID;
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REQ_ID URL
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1 X
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5 X,X,X
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select REQ_ID, Group_Concat(URL) as URL, Min(t1.URL_ID) urll,
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Max(t1.URL_ID)
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urlg from t1, t2 where t2.URL_ID = t1.URL_ID group by REQ_ID;
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REQ_ID URL urll urlg
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1 X 4 4
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5 X,X,X 4 5
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drop table t1;
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drop table t2;
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create table t1 (id int, name varchar(16));
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insert into t1 values (1,'longername'),(1,'evenlongername');
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select ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'without distinct: how it should be' from t1;
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without distinct: how it should be
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1:longername,1:evenlongername
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select distinct ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'with distinct: cutoff at length of shortname' from t1;
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with distinct: cutoff at length of shortname
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1:longername,1:evenlongername
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drop table t1;
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create table t1(id int);
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create table t2(id int);
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insert into t1 values(0),(1);
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select group_concat(t1.id) FROM t1,t2;
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group_concat(t1.id)
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NULL
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drop table t1;
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drop table t2;
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create table t1 (bar varchar(32));
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insert into t1 values('test'),('test2');
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select * from t1 having group_concat(bar)='';
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bar
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drop table t1;
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