Joining 3 tables in MySQL using PHP

Question

Hi,
I have the following 3 sample tables:
First
idkey
fk_second_idkey
fk_third_idkey
Second
idkey
Third
idkey
My SQL is
SELECT * FROM First INNER JOIN Second ON First.fk_second_idkey = Second.idkey INNER JOIN Third First.fk_third_idkey = Third.idkey AND First.fk_second_idkey = 2;
It compiles and I get a result set, but its repeated, so if i get back records 2, 3 and 4, the page will show 2, 3 and 4 about 3 times.
Can anyone assist with the above SQL?
Thanks.

Answer 1

Just kind of guessing at what you're trying to do, but if you want it grouped by the first table (one result per first table ID), then something like:
SELECT * FROM First
INNER JOIN Second
   ON First.fk_second_idkey = Second.idkey
INNER JOIN Third
   ON First.fk_third_idkey = Third.idkey
      AND First.fk_second_idkey = 2
GROUP BY First.idkey;
...but I'm unclear on what's happening already and what you need it to do. Are the linked tables a one-to-one relationship? one-to-many?