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select isnull('0',(b.sumpoints - a.usedpoints)) as points

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select isnull((b.sumpoints - a.usedpoints), 0) as points


isnull((b.sumpoints - a.usedpoints), 0)

SQL code:
select isnull((b.sumpoints - a.usedpoints),0) as points


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select isnull('0',(b.sumpoints - a.usedpoints)) as points

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SQL code:


isnull((b.sumpoints - a.usedpoints), 0)




˳Ðòд·´ÁËisnull((b.sumpoints - a.usedpoints), 0)




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