sql server2008根據分組，求每組總個數

數據庫：sql server2008 代碼： select mytype,COUNT(*) as thecount from ( select (case when isNull((AllPay+performancePay ),0) >= 0 and isNull((AllPay+performancePay ),0) < 5000 then 'A' when isNull((AllPay+

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