Try this
Select *
from resources, goals
where resources.ID = goals.RESOURCE_ID
and (SUBJECT="English"
and GRADE="1")
OR
(SUBJECT="English"
and GRADE="2");
-----Original Message-----
From: AM Thomas [mailto:[EMAIL PROTECTED]
Sent: Sunday, February 13, 2005 7:23 AM
To: mysql@lists.mysql.com
Subject: select where multiple joined records match
I'm trying to figure out how to select all the records in one table
which have multiple specified records in a second table. My MySQL is
version 4.0.23a, if that makes a difference.
Here's a simplified version of my problem.
I have two tables, resources and goals.
resources table:
ID TITLE
1 civil war women
2 bunnies on the plain
3 North Carolina and WWII
4 geodesic domes
goals table:
ID RESOURCE_ID GRADE SUBJECT
1 1 1 English
2 1 1 Soc
3 1 2 English
4 2 1 English
5 2 3 Soc
6 3 2 English
7 4 1 English
Now, how do I select all the resources which have 1st and 2nd grade
English goals? If I just do:
Select * from resources, goals where ((resources.ID =
goals.RESOURCE_ID) and (SUBJECT="English") and ((GRADE="1") and
(GRADE="2")));
I'll get no results, since no record of the joined set will have more
than one grade. I can't just put 'or' between the Grade
conditions; that would give resources 1, 2, 3, and 4, when only 1
really should match.
My real problem is slightly more complex, as the 'goals' table also
contains an additional field which might be searched on.
I'm thinking it's time for me to go into the deep end of SQL (MySQL,
actually), and my old O'Reilly MySQL & mSQL book isn't doing the
trick.
Surely this has come up before - thanks for any guidance.
- AM Thomas
--
Virtue of the Small / (919) 929-8687
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