SQL: How do I return zeroes where there is nothing to aggregate across?
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by Karl
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Published on 2010-03-15T07:17:36Z
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Hi
What I would like ask is best illustrated by an example, so bear with me. Suppose I have the following table:
TypeID Gender Count
1 M 10
1 F 3
1 F 6
3 M 11
3 M 8
I would like to aggregate this for every possible combination of TypeID and Gender. Where TypeID can be 1,2 or 3 and Gender can be M or F. So what I want is the following:
TypeID Gender SUM(Count)
1 M 10
1 F 9
2 M 0
2 F 0
3 M 19
3 F 0
I can think of a few ways to potentially do this, but none of them seem particularly elegant to me.
Any suggestions would be greatly appreciated!
Karl
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