can I do that with one select statement

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#67

From: Isaac
Date: Tue, 27 May 2008 08:46

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Hello,
I need to to sum a field and store the result into a variable in a 
stored procedure, can I use one select statement to get the sum based on 
a condition from another field

ex
sum(field_a) when field_b = 1
sum(field_a) when field_b = 0

field_a        field_b
5                 1
10                0
52                1


or I have to use two select ? sorry this may appear stupid but I am 
asking to improve performance

Thanks

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