Question

I have a complex query that includes some dynamic sql which partially depends upon a checkboxlist. Here’s the part that has me stumped right now (brain fart?).

Simple example:

Table A (id, name)

Table B (id, Aid, Cid)

Table C (id, color)

So lets say Table A has:

1, Bob
2, Tim
3, Pete

and Table C has:

1, Red
2, Blue
3, Green

Now Table B has

1, 1, 1
2, 1, 2
3, 3, 2

So that Bob’s favorite colors are Red and Blue and Pete’s favorite colors are only Blue.

How do I query so that I only retrieve rows from Table A that have favorite colors of both Red and Blue. I don’t want to see Pete in my resultset.

Answer 1

You want to use the INTERSECT operator to get those that match both, this is SQL 2005+ only, however.

SELECT name FROM TableA
WHERE ID IN (SELECT Aid FROM TableB WHERE CId = 1
             INTERSECT
             SELECT Aid FROM TableB WHERE CId = 2)