SQL Server 動態SQL使用(處理輸入和輸出變量)

/*爲動態SQL賦值*/
DECLARE @ZIPCODE NVARCHAR(50);
DECLARE @SQL NVARCHAR(200);
DECLARE @PARAM_DEF NVARCHAR(200);
SET @SQL =N'SELECT * from Company where zipcode=@VAR_ZIPCODE';
SET @PARAM_DEF=N'@VAR_ZIPCODE NVARCHAR(20)';
SET @ZIPCODE='10016';
EXECUTE sp_executesql @SQL, @PARAM_DEF,
                      @VAR_ZIPCODE = @ZIPCODE;
                      
/*從動態SQL 中獲取數值*/

DECLARE @ZIPCODE NVARCHAR(50);
DECLARE @SQL NVARCHAR(200);
DECLARE @PARAM_DEF NVARCHAR(200);
DECLARE @P_OUT NVARCHAR(20);
SET @SQL =N'SELECT @V_OUT=companyName from Company where zipcode=@VAR_ZIPCODE';
SET @PARAM_DEF=N'@VAR_ZIPCODE NVARCHAR(20),@V_OUT VARCHAR(20) OUTPUT';
SET @ZIPCODE='10016';
EXECUTE sp_executesql @SQL, @PARAM_DEF,
                      @VAR_ZIPCODE = @ZIPCODE,
                      @V_OUT =@P_OUT  OUTPUT;
SELECT @P_OUT

下面介紹一下SQL SERVER中，如何爲動態SQL設置變量以及獲取動態SQL的輸出變量.