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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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SQL code:
isnull((b.sumpoints - a.usedpoints), 0)
˳Ðòд·´ÁËisnull((b.sumpoints - a.usedpoints), 0)
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