多表連接 Left join

一個我寫的實例：其中多表鏈接，一共鏈接了3個表。使用匯集函數SUM，用到了GROUP BYsql SELECT  a. [ UserID ] ,b. [ Name ] , sum  (c. [ Money ] + c. [ Bank ] ) as  TotalMoney FROM  Table1 a(nolock)   LEFT   JOIN  Table2 b(nolock)  on  a. [

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