row.result
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:5k
- drop table if exists t1;
- select (1,2,3) IN ((3,2,3), (1,2,3), (1,3,3));
- (1,2,3) IN ((3,2,3), (1,2,3), (1,3,3))
- 1
- select row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
- row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3))
- 0
- select row(1,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
- row(1,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3))
- 1
- select row(10,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
- row(10,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3))
- 0
- select row('a',1.5,3) IN (row(1,2,3), row('a',1.5,3), row('a','a','a'));
- row('a',1.5,3) IN (row(1,2,3), row('a',1.5,3), row('a','a','a'))
- 1
- select row('a',0,3) IN (row(3,2,3), row('a','0','3'), row(1,3,3));
- row('a',0,3) IN (row(3,2,3), row('a','0','3'), row(1,3,3))
- 1
- select row('a',0,3) IN (row(3,2,3), row('a','a','3'), row(1,3,3));
- row('a',0,3) IN (row(3,2,3), row('a','a','3'), row(1,3,3))
- 1
- select row('a',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
- row('a',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3))
- 1
- select row('b',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
- row('b',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3))
- 0
- select row('b',1.5,3) IN (row('b',NULL,3), row('a',1.5,3), row(1,3,3));
- row('b',1.5,3) IN (row('b',NULL,3), row('a',1.5,3), row(1,3,3))
- NULL
- select row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3));
- row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3))
- 0
- select (1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)));
- (1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)))
- 1
- select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,4));
- ERROR 21000: Operand should contain 2 column(s)
- select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
- row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)))
- NULL
- explain extended select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
- id select_type table type possible_keys key key_len ref rows Extra
- 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
- Warnings:
- Note 1003 select ((1,2,(3,4)) in ((3,2,(3,4)),(1,2,(3,NULL)))) AS `row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)))`
- SELECT (1,2,3)=(0,NULL,3);
- (1,2,3)=(0,NULL,3)
- 0
- SELECT (1,2,3)=(1,NULL,3);
- (1,2,3)=(1,NULL,3)
- NULL
- SELECT (1,2,3)=(1,NULL,0);
- (1,2,3)=(1,NULL,0)
- NULL
- SELECT ROW(1,2,3)=ROW(1,2,3);
- ROW(1,2,3)=ROW(1,2,3)
- 1
- SELECT ROW(2,2,3)=ROW(1+1,2,3);
- ROW(2,2,3)=ROW(1+1,2,3)
- 1
- SELECT ROW(1,2,3)=ROW(1+1,2,3);
- ROW(1,2,3)=ROW(1+1,2,3)
- 0
- SELECT ROW(1,2,3)<ROW(1+1,2,3);
- ROW(1,2,3)<ROW(1+1,2,3)
- 1
- SELECT ROW(1,2,3)>ROW(1+1,2,3);
- ROW(1,2,3)>ROW(1+1,2,3)
- 0
- SELECT ROW(1,2,3)<=ROW(1+1,2,3);
- ROW(1,2,3)<=ROW(1+1,2,3)
- 1
- SELECT ROW(1,2,3)>=ROW(1+1,2,3);
- ROW(1,2,3)>=ROW(1+1,2,3)
- 0
- SELECT ROW(1,2,3)<>ROW(1+1,2,3);
- ROW(1,2,3)<>ROW(1+1,2,3)
- 1
- SELECT ROW(NULL,2,3)=ROW(NULL,2,3);
- ROW(NULL,2,3)=ROW(NULL,2,3)
- NULL
- SELECT ROW(NULL,2,3)<=>ROW(NULL,2,3);
- ROW(NULL,2,3)<=>ROW(NULL,2,3)
- 1
- SELECT ROW(1,2,ROW(3,4,5))=ROW(1,2,ROW(3,4,5));
- ROW(1,2,ROW(3,4,5))=ROW(1,2,ROW(3,4,5))
- 1
- SELECT ROW('test',2,3.33)=ROW('test',2,3.33);
- ROW('test',2,3.33)=ROW('test',2,3.33)
- 1
- SELECT ROW('test',2,3.33)=ROW('test',2,3.33,4);
- ERROR 21000: Operand should contain 3 column(s)
- SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,33));
- ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,33))
- 1
- SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,3));
- ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,3))
- 0
- SELECT ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,NULL));
- ROW('test',2,ROW(3,33))=ROW('test',2,ROW(3,NULL))
- NULL
- SELECT ROW('test',2,ROW(3,33))=ROW('test',2,4);
- ERROR 21000: Operand should contain 2 column(s)
- create table t1 ( a int, b int, c int);
- insert into t1 values (1,2,3), (2,3,1), (3,2,1), (1,2,NULL);
- select * from t1 where ROW(1,2,3)=ROW(a,b,c);
- a b c
- 1 2 3
- select * from t1 where ROW(0,2,3)=ROW(a,b,c);
- a b c
- select * from t1 where ROW(1,2,3)<ROW(a,b,c);
- a b c
- 2 3 1
- 3 2 1
- select ROW(a,2,3) IN(row(1,b,c), row(2,3,1)) from t1;
- ROW(a,2,3) IN(row(1,b,c), row(2,3,1))
- 1
- 0
- 0
- NULL
- select ROW(c,2,3) IN(row(1,b,a), row(2,3,1)) from t1;
- ROW(c,2,3) IN(row(1,b,a), row(2,3,1))
- 0
- 0
- 1
- NULL
- select ROW(a,b,c) IN(row(1,2,3), row(3,2,1)) from t1;
- ROW(a,b,c) IN(row(1,2,3), row(3,2,1))
- 1
- 0
- 1
- NULL
- select ROW(1,2,3) IN(row(a,b,c), row(1,2,3)) from t1;
- ROW(1,2,3) IN(row(a,b,c), row(1,2,3))
- 1
- 1
- 1
- 1
- drop table t1;
- select ROW(1,1);
- ERROR 21000: Operand should contain 1 column(s)
- create table t1 (i int);
- select 1 from t1 where ROW(1,1);
- ERROR 21000: Operand should contain 1 column(s)
- select count(*) from t1 order by ROW(1,1);
- ERROR 21000: Operand should contain 1 column(s)
- select count(*) from t1 having (1,1) order by i;
- ERROR 21000: Operand should contain 1 column(s)
- drop table t1;
- create table t1 (a int, b int);
- insert into t1 values (1, 4);
- insert into t1 values (10, 40);
- insert into t1 values (1, 4);
- insert into t1 values (10, 43);
- insert into t1 values (1, 4);
- insert into t1 values (10, 41);
- insert into t1 values (1, 4);
- insert into t1 values (10, 43);
- insert into t1 values (1, 4);
- select a, MAX(b), (1, MAX(b)) = (1, 4) from t1 group by a;
- a MAX(b) (1, MAX(b)) = (1, 4)
- 1 4 1
- 10 43 0
- drop table t1;
- SELECT ROW(2,10) <=> ROW(3,4);
- ROW(2,10) <=> ROW(3,4)
- 0
- SELECT ROW(NULL,10) <=> ROW(3,NULL);
- ROW(NULL,10) <=> ROW(3,NULL)
- 0