摘要： SELECT Id, AnimalName FROM dbo.Farm WHERE Farm_id = ? Assuming my Parameter is an integer Variable named User::Farm_id Choose the following values on the Parameter Mapping ScreenVariable Name - User::Farm_idDirection - InputData Type - LONGParameter Name - 0Parameter Size - -1 阅读全文

摘要： Consider a table with two non-clustered indexes that could satisfy a SELECT query.The first index has all the required columns.The second index has all the required columns, plus several additional columns.SQL 服务器：最大限度的减少磁盘 I/O。 URL：http://technet.microsoft.com/zh-cn/magazine/jj643251.aspx 阅读全文