I am trying to join 3 tables together.
Table A has 3 fields: sub_id, subject, id
Table B has 3 fields: ref_cat_id, sub_id, ref_cat
Table C has 7 fields: uid, ref_cat_id, etc.
I am trying to join Table A and B over sub_id and join B and C over ref_cat_id
while pulling in the value of sub_id and ref_cat_id from a php program
I tried doing it this way:
select reference.uid from reference, subject_name, ref_cat where
subject_name.sub_id = '45' and ref_cat.ref_cat_id = '3' and
ref_cat.ref_cat_id = reference.ref_cat_id and subject_name.sub_id =
ref_cat.sub_id
with the '45' and '3' being the values coming from my variables in
PHP. We only have MySql 4.0 so I can't use a subquery.
If anyone has any suggestions I would be very thankful. Please also
let me know if I need to provide more information about the problem.
Thank you for your time and help.
Amy Thornton, Electronic Services Specialist
Information Services, Cook Library
The University of Southern Mississippi
118 College Drive #5053
Hattiesburg, MS 39406-0001
Phone: (601) 266-6668
Fax: (601) 266-6857
E-mail: [EMAIL PROTECTED]
http://www.lib.usm.edu/
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