Question

I’m looking to create either a stored procedure or a decent sql statement to query FROM a result set.

So, I’m searching one table for room_numbers that are affiliated with user BOB

SELECT room_number FROM room_user WHERE user = BOB;

this will give me a few results, if I were to print my results from my PDO result set I’d see

Array
(
   Array(
      [room_number] = 10
   )
   Array(
      [room_number] = 13
   )

)

I could take this retrieved data, imploded it into a string and then make a second query:

SELECT title FROM rooms WHERE room_number IN('$roomString');

But, I’m sure there is a much more direct method seeing as I’m already in my database.

Anyone know of a handy procedure or statement to make to handle this?

Answer 1

This is just a JOIN.

SELECT rooms.title, rooms.room_number FROM rooms
JOIN room_user ON
    room_user.user = "BOB" AND
    room_user.room_number = rooms.room_number