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SQL Sub Query

Posted on 2013-05-23
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Last Modified: 2013-05-23
Hi,

I expect this is a nice easy one.

I have a statement

SELECT a, Sum(b), Sum(c)
FROM tbl1
Group By a

But I want to restrict the results to certain records found in tbl2

Thanks
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Question by:BananaFury
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Accepted Solution

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Jim Horn earned 500 total points
ID: 39190801
>But I want to restrict the results to certain records found in tbl2
Then join tbl1 to tbl2, and the ON clause would spell out the relationship between the two tables such that anything that doesn't match in both tables would not be returned.

SELECT tbl1.a, Sum(tbl1.b), Sum(tbl1.c)
FROM tbl1
   JOIN tbl2 ON tbl1.ID = tbl2.tbl1_ID    -- How the tables are joined 
WHERE tbl2.some_value = "something"   -- If you want to restrict it further based on specific criteria
GROUP BY tbl1.a

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Author Closing Comment

by:BananaFury
ID: 39190940
Great, thanks!
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LVL 66

Expert Comment

by:Jim Horn
ID: 39190942
Thanks for the grade.  Good luck with your project.  -Jim
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