Question

For example i have requested:

WHERE (friend_id=? OR client_id=?)

How do i know which row meets friend_id condition and which meets client_id condition?

Is it possible to mark/flag rows depending of meeting condition somehow?

Thanks.

Answer 1

SELECT friend_id=? FROM yourtable WHERE (friend_id=? OR client_id=?);

You will get a true if the friend_id clause matches:
Or even:

SELECT friend_id=?, client_id=? FROM yourtable WHERE (friend_id=? OR client_id=?);

To get both matches. In this way you can see if one or both matches.