Question

我在如何使用存储过程向一个客户添加多个位置时遇到问题。下面是我的表格，我使用索引来帮助我向一个客户添加多个位置，但我应该

SELECT @intLocationIndex = MAX(intLocationIndex) +1

太？

CREATE TABLE TCustomer
(
     intCustomerID INTEGER NOT NULL,
     strCustomerName VARCHAR(50) NOT NULL,
     strAddress VARCHAR(50) NOT NULL,

     CONSTRAINT TCustomer_PK PRIMARY KEY (intCustomerID)
)

CREATE TABLE TCustomerLocation
(
     intLocationID INTEGER NOT NULL,
     intLocationIndex INTEGER NOT NULL,
     intCustomerID INTEGER NOT NULL,

     CONSTRAINT TCustomerLocation_PK 
         PRIMARY KEY(intLocationID, intLocationIndex)
)

CREATE TABLE TLocation
(
     intLocationID INTEGER NOT NULL,
     strLocationName VARCHAR(50) NOT NULL,
     strLocationAddress VARCHAR(50) NOT NULL,
     strLocationCity VARCHAR(50) NOT NULL,
     CONSTRAINT TLocation_PK PRIMARY KEY(intLocationID)
)

CREATE PROCEDURE uspAddCustomerLocation
     @strCustomerName VARCHAR(50),
     @strAddress VARCHAR(50),
     @strLocationName VARCHAR(50),
     @strLocationAddress VARCHAR(50),
     @strLocationCity VARCHAR(50)
AS

BEGIN TRANSACTION
SET XACT_ABORT ON

DECLARE @intCustomerID INTEGER

SELECT @intCustomerID = MAX(intCustomerID) + 1
FROM TCustomer (TABLOCKX) -- LOCK TABLE UNTIL THE END OF TRANSACTION

SELECT @intCustomerID = COALESCE( @intCustomerID , 1)

    INSERT INTO TCustomer (intCustomerID, strCustomerName , strAddress)
    VALUES(@intCustomerID ,@strCustomerName ,@strAddress)

DECLARE @intLocationID  INTEGER
DECLARE @intLocationIndex   INTEGER

SELECT @intLocationID = MAX(intLocationID) + 1
FROM TLocation (TABLOCKX) -- LOCK TABLE UNTIL THEEND OF TRANSACTION


COMMIT TRANSACTION

GO

Answer 1

我不是DBA，但我希望这些ID字段是IDENTITY字段。无论如何，我认为有问题的选择将是SELECT @intLocationIndex = MAX(intLocationIndex) +1 Where intCustomerID = @intCustomerID

如何使用存储过程向一个客户添加多个位置？

1 个答案: