Question

How can I count all the rows from 2 tables where…

`approved` == '0'

?

Answer 1

You need to do an aggregate on a union:

select sum(subcount) as totalcount 
    from ( select count(*) as subcount from table1 where approved = 0
           union
           select count(*) as subcount from table2 where approved = 0 )

There are other ways but this shows your intent very clearly, especially naming the columns this way.

Hope this helps