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Sum up the count of three tables

 
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Neena John

New User


Joined: 20 Nov 2008
Posts: 13
Location: bangalore

PostPosted: Thu Jul 16, 2009 2:25 pm    Post subject: Sum up the count of three tables
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There are three tables
Current,History and archive.The contents of these tables are consolidated in one table called Full.

I need to write a query in which i need to
sum up the record count of Current,History and archive

For example
SELECT COUNT(*) AS C
FROM CURRENT
UNION
SELECT COUNT(*) AS H
FROM HISTORY
UNION
SELECT COUNT(*) AS A
FROM ARCHIVE;

Now i need to sum up the count values(c,h,a) in the same query.
Can anyone help me on this?
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sushanth bobby

Senior Member


Joined: 29 Jul 2008
Posts: 1013
Location: India

PostPosted: Thu Jul 16, 2009 3:09 pm    Post subject:
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Neena,

Try something like this.
Code:
SELECT SUM(CNT) FROM (                           
SELECT COUNT(*) AS CNT FROM BOBT1.COUNTRY         
UNION ALL                                         
SELECT COUNT(*) AS CNT FROM BOBT1.EMPLOYEE ) AS A


Sushanth
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