Solution to “subquery returns more than 1 row” error

Question

I have one query that returns multiple rows, and another query in which I want to set criteria to be either one of values from those multiple rows , so basicly I want the su

Answer 1

You can use in():

select * 
from table
where id in (multiple row query)

or use a join:

select distinct t.* 
from source_of_id_table s
join table t on t.id = s.t_id
where 

The join is never a worse choice for performance, and depending on the exact situation and the database you're using, can give much better performance.