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Sep 29, 2013, 22:54 #1
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- Oct 2011
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Need help in select statement from two tables
I have a problem in my select query statement to get the value of reject from op_reject table and spv_reject table in one row
here is my query:
SELECT o.compound_type, SUM(o.reject) AS op_reject, s.compound_type, SUM(s.reject) AS spv_reject FROM op_reject AS o ,spv_reject AS s WHERE o.compound_type = 'P28' AND s.compound_type = 'P28' AND o.process_id = '2' AND s.process_id = '2' AND o.reject_date = '2013-09-30' AND s.reject_date = '2013-09-30' GROUP BY o.compound_type, o.process_id;
but it should only be:
because the sum of rejects are only 3.00
I attached my database for your reference.
Any help is highly appreciated.
Thank you so much.
Sep 29, 2013, 23:48 #2
In your query you didn't specify any join condition, so all rows from the two tables that meet the select criteria will be cross-joined to each other. In this specific case, looking at the data in your database, you have two rows in each table that are selected, with 1 and 2 as reject values. The final join result is:
op_reject spv_reject 1 1 2 2 1 2 2 1Guido - Community Team Leader
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