Question

I Have following table structure

Table 1:

| id | allowed_user_type |
| 1  | 8,9,10  |

Table 2:

| id | user_type |
| 1  | 9         |

so, wanted to check if user_type from Table 2 is exists in allowed_user_type in Table 1: then returns me true otherwise false.

I’ve used IN and FIND_IN_SET MySQL statement but no help.

Thanks!

Answer 1

FIND_IN_SET works for me.

select t1.id, find_in_set(user_type, allowed_user_type) > 0 found
from table1 t1 join table2 t2 using (id);

SQLFIDDLE

But I agree with the other posters that this is poor design. If you have to do it for a large number of rows it will be very slow, because it can’t use indexes.