SQL:exec sp_executesql 用法

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--這種是無效的過程 declare @sql nvarchar(500), @where nvarchar(500),@i nvarchar(64),@p nvarchar(50),@id int set @id=5 set @sql='select '+@p+'=AreaCode from AdministrativeAreaList where AreaID='+cast(@id as varchar) --select @sql exec @sql --測試結果：未能找到存储过程 ''。

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---sql server 2000/2005  塗聚文 20130716 DECLARE @TableName VARCHAR(500),@sql NVARCHAR(200),@OrderID INT,@c nvarchar(50),@cstucount nvarchar(50)  SET @TableName = 'AdministrativeAreaList ';  SET @OrderID = 5; SET @sql = 'SELECT top 1 @c=AreaCode FROM AdministrativeAreaList WHERE AreaID ='+cast(@OrderID as nvarchar)+' ORDER BY AreaID DESC'   exec sp_executesql @sql,N'@c nvarchar(50) output',@cstucount output--将exec的结果放入变量中的做法 select @cstucount