SQl语句 两表两字段包含集合
表A中a字段在表B中b字段包含的集合如图:B中包含456的查出来,就是证明两个有关联,两表的集合 SQL
[解决办法]
declare @n int
select @n=count(*)
from a
where exists(select 1 from b where charindex(a.a,b.b)>0)
if isnull(@n,0)>0
print '有关联'
else
print '无关联'
[解决办法]
create table a (a varchar(20))
insert into a values('123')
insert into a values('245')
insert into a values('445')
insert into a values('4542')
insert into a values('456')
create table b (b varchar(20))
insert into b values('123456')
insert into b values('55456')
insert into b values('45896')
go
select a.a , b.b from a , b where charindex(a.a , b.b) > 0
/*
a b
-------------------- --------------------
123 123456
456 123456
456 55456
(所影响的行数为 3 行)
*/
select a.a , b.b from a , b where b.b like '%' + a.a + '%'
/*
a b
-------------------- --------------------
123 123456
456 123456
456 55456
(所影响的行数为 3 行)
*/
drop table a , b