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UNION SUM

 
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Sarangadhar
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Joined: 14 Oct 2004
Posts: 130
Topics: 43
Location: virtual village
PostPosted: Mon Apr 09, 2007 3:03 pm    Post subject: UNION SUM Reply with quote
Hi,
I have data in 3 tables. I need to sum up a column from three tables. If the matching row presents, sum the column in all tables, or sum in the tables wherever it is present.

SELECT AMOUNT1
FROM TABLE1

SELECT AMOUNT2
FROM TABLE2

SELECT AMOUNT3
FROM TABLE3

from the above 3 queries, if amounts are present in all tables for a particular criteria, i need them to add. if present in only one, i just need to pick and sum wherever the are present and create a single row in resultant table.
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kolusu
Site Admin
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Joined: 26 Nov 2002
Posts: 12376
Topics: 75
Location: San Jose
PostPosted: Mon Apr 09, 2007 3:47 pm    Post subject: Reply with quote
Sarangadhar,

show us a sample data and desired output along with the conditions to be checked.

Kolusu
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