Question

Say for example I have this table:

Items:
-------
id
title
price

And I wanted to create a query that created a new row that for each item, it would query another table that matched the id, with the id in the other table, set the row another row in the other table.

Answer 1

Try something like this:

select
    ThisTable.id,
    title,
    price,
    other_count
from
(
    select
        id,
        count(*) as other_count
    from OtherTable
    group by id
) OtherTableCount
    inner join ThisTable
        on ThisTable.id = OtherTable.id