Adding with NULL values - SQL Server Forums

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Adding with NULL values

Author

Topic

ninel
Posting Yak Master

141 Posts

Posted - 2005-07-07 : 11:57:49

I have 3 columns that need to be summed up, but any one of these can contain a NULL value.

Col1 Col2 Col3 Col4
A 2.67 4.7 2.8
B 6.2 NULL 2.6
C 12.4 NULL NULL

How can I sum them up to look like this without updating the NULLS with a 0?

A = 10.17
B = 8.8
C = 12.4

Thanks,
Ninel

jsmith8858
Dr. Cross Join

7423 Posts

Posted - 2005-07-07 : 12:11:08

Lookup COALESCE in books on-line.

- Jeff

CokoBWare
Starting Member

6 Posts

Posted - 2005-07-08 : 09:57:14

Try wrapping the Col2, Col3, and Col4 in ISNULL...

so, A = ISNULL(Col2,0) + ISNULL(Col3,0) + ISNULL(Col4,0)

ISNULL is really handy when you need to check for NULL and substitute without actually changing your table.

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