【SQLSERVER】存储过程_sql

概述ALTER PROC SP_SinoAirNumberGet@ShipmentNumber NVARCHAR(50)ASBEGIN DECLARE @ColoaderShipmentNumber NVARCHAR(50),@ShipmentCode NVARCHAR(50),@errorMessage NVARCHAR(200) SET @ColoaderShipmentNumber =

ALTER PROC SP_SinoAirNumberGet@ShipmentNumber NVARCHAR(50)ASBEGIN	DECLARE @ColoaderShipmentNumber NVARCHAR(50),@ShipmentCode NVARCHAR(50),@errorMessage NVARCHAR(200)	SET @ColoaderShipmentNumber = ''	 --check agent shipment	SELECT @ShipmentCode = ShipmentCode FROM Shipment s with (nolock)	INNER JOIN Customer c ON s.CustomerCode = c.CustomerCode AND FranchiseCodeRelate IS NulL 	WHERE ShipmentNumber = @ShipmentNumber			--check gateway shipment	IF @ShipmentCode IS NulL OR @ShipmentCode = ''	BEGIN		SELECT @ShipmentCode = ShipmentCode FROM Shipment s with (nolock)		INNER JOIN Customer c ON s.CustomerCode = c.CustomerCode AND FranchiseCodeRelate IS NOT NulL 		WHERE ShipmentNumber = @ShipmentNumber	END		IF @ShipmentCode IS NulL OR @ShipmentCode = ''	BEGIN		RAISERROR('错误的提单号码!',16,1)		RETURN	END		SELECT @ColoaderShipmentNumber = SinoAirNumber FROM SinoAirNumber with (nolock) WHERE ShipmentCode = @ShipmentCode	IF @ColoaderShipmentNumber IS NOT NulL AND @ColoaderShipmentNumber != ''	BEGIN		SELECT @ColoaderShipmentNumber AS SinoAirNumber				RETURN	END	SET @ColoaderShipmentNumber = ''	IF @ColoaderShipmentNumber IS NulL OR @ColoaderShipmentNumber = ''	BEGIN		SELECT top 1 @ColoaderShipmentNumber = SinoAirNumber		FROM SinoAirNumber with (nolock)		WHERE SinoAirNumberStatus != 'Y' OR SinoAirNumberStatus IS NulL		ORDER BY SinoAirNumber ASC	END 	IF (EXISTS (SELECT 1 FROM SinoAirNumber WHERE SinoAirNumber = @ColoaderShipmentNumber AND (SinoAirNumberStatus != 'Y' OR SinoAirNumberStatus IS NulL)))		OR  (EXISTS (SELECT 1 FROM SinoAirNumber WHERE SinoAirNumber = @ShipmentNumber AND SinoAirNumberStatus = 'Y' ))	BEGIN		BEGIN TRANSACTION		BEGIN TRY			UPDATE SinoAirNumber SET SinoAirNumberStatus = 'Y',ShipmentCode = @ShipmentCode WHERE SinoAirNumber = @ColoaderShipmentNumber			UPDATE Shipment SET ShipmentNumber = @ColoaderShipmentNumber,ColoaderNumber=@ShipmentNumber WHERE ShipmentCode = @ShipmentCode			INSERT INTO ShipmentExtraInfo (ShipmentCode,ShipmentNumber) VALUES (@ShipmentCode,@ColoaderShipmentNumber)			COMMIT		END TRY		BEGIN CATCH			RolLBACK			SET @errorMessage = ERROR_MESSAGE()			RAISERROR(@errorMessage,1)		END CATCH	END	ELSE	BEGIN		SELECT top 1 @ColoaderShipmentNumber = SinoAirNumber		FROM SinoAirNumber with (nolock)		WHERE SinoAirNumberStatus != 'Y' OR SinoAirNumberStatus IS NulL		ORDER BY SinoAirNumber ASC	END	IF @ColoaderShipmentNumber IS NulL OR @ColoaderShipmentNumber = ''	BEGIN		RAISERROR('Number pool has empty',1)		RETURN	END	SELECT @ColoaderShipmentNumber AS SinoAirNumberEND

(1).创建存储过程的语句：

CREATE PROC SP_Testname

@Parameter Type(length)

BEGIN

...

END

(2).x修改存储过程：

ALTER....

(3).DECLARE关键字，声明参数（全局变量）

(4).SET语句，为参数赋值，或初始化参数

(5).SELECT @ShipmentCode = ShipmentCode FROM Shipment s with (nolock)
INNER JOIN Customer c ON s.CustomerCode = c.CustomerCode AND FranchiseCodeRelate IS NulL
WHERE ShipmentNumber = @ShipmentNumber

INNER JOIN ：内连接

with（NolOCK）：指定允许脏读。在sqlserver中，当一个事物访问某张表时，该表出于lock状态，另一事物必须等待该事物结束之后，才能访问当前表。脏读的意思是：

允许当前一事物在另一事物访问某表时，读取当前表的数据，注意只允许读取，不允许其他数据库 *** 作。这样会造成一定数据上的错误。适用于报表。

(6).EXISTS:判断当前查询是否存在一列或多于一列，返回true或false。当当前查询无列即无数据返回时，EXISTS返回false，当数据返回时，EXISTS返回true。

(7).事物（TRANSACTION）：当存在两条或两条以上的增删改（注意查询不算）语句时，应开启事务，若发生错误，rellback，并使用try catch将错误信息返回。

格式：

BEGIN TRANSACTION

BEGIN TRY

....

COMMIT

END TRY

BEGIN CATCH