mirror of
https://github.com/MariaDB/server.git
synced 2025-08-26 01:44:06 +03:00
56 lines
1.3 KiB
Plaintext
56 lines
1.3 KiB
Plaintext
drop table if exists t1;
|
||
CREATE TABLE t1 (id CHAR(12) not null, PRIMARY KEY (id));
|
||
insert into t1 values ('000000000001'),('000000000002');
|
||
explain select * from t1 where id=000000000001;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 SIMPLE t1 index PRIMARY PRIMARY 12 NULL 2 Using where; Using index
|
||
select * from t1 where id=000000000001;
|
||
id
|
||
000000000001
|
||
delete from t1 where id=000000000002;
|
||
select * from t1;
|
||
id
|
||
000000000001
|
||
drop table t1;
|
||
SELECT 'a' = 'a ';
|
||
'a' = 'a '
|
||
1
|
||
SELECT 'a\0' < 'a';
|
||
'a\0' < 'a'
|
||
1
|
||
SELECT 'a\0' < 'a ';
|
||
'a\0' < 'a '
|
||
1
|
||
SELECT 'a\t' < 'a';
|
||
'a\t' < 'a'
|
||
1
|
||
SELECT 'a\t' < 'a ';
|
||
'a\t' < 'a '
|
||
1
|
||
CREATE TABLE t1 (a char(10) not null);
|
||
INSERT INTO t1 VALUES ('a'),('a\0'),('a\t'),('a ');
|
||
SELECT hex(a),STRCMP(a,'a'), STRCMP(a,'a ') FROM t1;
|
||
hex(a) STRCMP(a,'a') STRCMP(a,'a ')
|
||
61 0 0
|
||
6100 -1 -1
|
||
6109 -1 -1
|
||
61 0 0
|
||
DROP TABLE t1;
|
||
SELECT CHAR(31) = '', '' = CHAR(31);
|
||
CHAR(31) = '' '' = CHAR(31)
|
||
0 0
|
||
SELECT CHAR(30) = '', '' = CHAR(30);
|
||
CHAR(30) = '' '' = CHAR(30)
|
||
0 0
|
||
create table t1 (a tinyint(1),b binary(1));
|
||
insert into t1 values (0x01,0x01);
|
||
select * from t1 where a=b;
|
||
a b
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect DOUBLE value: ''
|
||
select * from t1 where a=b and b=0x01;
|
||
a b
|
||
Warnings:
|
||
Warning 1292 Truncated incorrect DOUBLE value: ''
|
||
drop table if exists t1;
|