如何一起使用？

Question

如何一起使用？

SELECT a FROM A WHERE a LIKE (SELECT b FROM B WHERE c='india');

其中a和b列不相等但b仅包含a的前三位数，如下所示 A = 145xxxxxx; B = 145;

任何线索？如何实现呢？

Answer 1

SELECT A.a 
FROM A 
inner join B on A.a like concat(B.b,'%')
             and B.c = 'india'

Answer 2

SELECT a FROM A 
WHERE EXISTS (SELECT 1 FROM B WHERE c='india' AND A.a LIKE CONCAT(B.b,'%') );