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Coalesce with sum

I want the sum to be zero instead of null in a case statement Case when transactiontypecode = 'ABS' then coalesce(sum(Amt),0) end as ABS , Is there a way around this? Thanks a lot
sqlaggregatesnull
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Tom Staab answered
Just change the order of operations. Instead of CASE WHEN transactiontypecode = 'ABS' THEN COALESCE(SUM(Amt),0) END AS ABS do SUM(CASE WHEN transactiontypecode = 'ABS' THEN Amt ELSE 0 END) AS ABS
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Thanks a lot It worked Appreciate greatly
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