在IN Clause Mysql中使用GROUP_CONCAT结果

Question

i have aq query which returns comma sepreted integers like

select GROUP_CONCAT(ids) from table2

now i want to use that result in another query like

select * from table1 where column in (select GROUP_CONCAT(ids) from table2)

in this case it will consider only forst value in IN clause.

Answer 1

I agree with @Alma that this can't be done with IN, you might be able to do it with FIND_IN_SET , but if you can do it with IN it's probably a better approach :

SELECT *
FROM table1
WHERE find_in_set(ids, (
      SELECT GROUP_CONCAT(ids)
      FROM table2
      )) != 0;

sqlfiddle demo

Answer 2

Any special reason not using a join and using a sub query

select * from table1 t1
JOIN table2 t2 on (t2.column = t1.ids)