Dynamic SQL 動態SQL語句的兩種用法

Dynamic SQL

從Dynamic SQL 讀取返回值

DECLARE @query as nvarchar(200), @count int;
SET @query = N'SELECT @count = COUNT(*)  FROM Orders';

EXEC sp_executesql @query, 
                   N'@count int OUTPUT', 
                   @count OUTPUT

SELECT @count 

向Dynamic SQL傳參數

DECLARE @ParmDefinition nvarchar(500)='@ID INT', @SQLCmd nvarchar(max),@ID INT=0

SET @SQLCmd='SELECT * FROM Sales.Orders WHERE OrderID=@ID'

EXEC sp_executesql @SQLCmd,@ParmDefinition,@ID