mysql> select * from a1;
+--------+
| id ids|
+--------+
| 201401 123#456#234 |
| 201402 789#123#678 |
| 201403 321#234#789 |
| 201404 789#264#769 |
+--------+
mysql> select * from b1;
+----+
| id |
+----+
| 123 |
| 234 |
| 456 |
+----+
我想把a1.id中含有b1.id的值的记录找出来,这相当于对b1.id的值分别做like查询:
select * from a1 where a1.id like '%123%' UNION select * from a1 where a1.
id like '%234%' UNION select * from a1 where a1.id like '%456%';
最后想要得到下面的效果
+--------+
| id |
+--------+
| 201401 |
| 201402 |
| 201403 |
+--------+
解决方式:
一、
select * from a1 where exists (select id from b1 where INSTR(a1.id,id));
二、
select * from a1 where exists (select id from b1 where a1.id like concat('%',id,'%'));
三、
select * from a1 where exists (select id from b1 where a1.id regexp id);
四、
select distinct a1.id from a1 inner join b1 on a1.id regexp b1.id;
五、
select distinct a1.id from a1 , b1 where INSTR(a1.id,b1.id);