SQL Parent/Child recursive call or union?

Question

I can\'t seem to find a relevant example out there.

I\'m trying to return a sub-set of a table, and for each row in that table, I want to check how many children it has,

Answer 1

I believe this is what you are trying to do:

SELECT P.PK_ID, P.Column1, P.Column2, COUNT(C.PK_ID)
FROM
    Parent P
    LEFT JOIN Child C ON C.PK_ID = P.FK1
GROUP BY
    P.PK_ID, P.Column1, P.Column2