Question

I have a parent table and a child table related to the parent table by some REFERENCE.

Suppose I exec a SELECT statement on the child and that it returns the at least one result. Can I arrange for my search to automatically yield all the content of all related parents with this child too?

Or must I always take the reference from the child and put this in a second SELECT statement and exec this myself?

Answer 1

You can use subqueries:

SELECT *
FROM Parent
WHERE Parent.Id IN (SELECT ParentId
                    FROM Child
                    WHERE Whatever_was_your_original_query)

Or a good old join:

SELECT Parent.*
FROM Parent INNER JOIN Child ON Parent.Id = Child.ParentId
WHERE Whatever_you_want_to_query