Question

作为一名新手，我有一个问题可以帮助我解决我正在处理的问题。

使用下面创建的表，有没有办法修改存储过程以更新表中的多行

CREATE TABLE AccountTable
(
  RowID int IDENTITY(1, 1),
  AccountID varchar(2),
  AccountName varchar(50),
  SeqNum int,
  SeqDate datetime
)

CREATE PROCEDURE [ACCOUNTTABLE_UPDATE]
(
  @SeqNum int,
  @SeqDate datetime,
  @Account_ID varchar(2)
)

AS 
SET NOCOUNT ON
BEGIN
UPDATE AccountTable
SET SeqNum = @SeqNum, SeqDate = @SeqDate
WHERE AccountID = @AccountID
END

EXEC ACCOUNTTABLE_UPDATE  SeqNumValue, SeqDateValue, AccountIDValue

手动运行存储过程当然会编辑一行，添加更多值会导致参数错误太多。我只是想看看这个存储过程是否实际上可以更新表中的多行，或者是否应该修改它实际上处理提供超过3个参数。

Answer 1

您可以使用表格值参数（here是一些信息）

首先创建表格类型和SP：

USE MyDB;  
GO  

-- Create a table type.  
CREATE TYPE SomeTableType AS TABLE ( 
    SeqNum int,
    SeqDate datetime,
    Account_ID varchar(2)
);  
GO  

-- Create a procedure to receive data for the table-valued parameter. 
CREATE PROCEDURE [ACCOUNTTABLE_UPDATE]  
    @T SomeTableType READONLY  
AS   
SET NOCOUNT ON  

UPDATE AT
SET SeqNum = t.SeqNum, SeqDate = t.SeqDate
FROM AccountTable AT
INNER JOIN @T t
    ON t.AccountID = AT.AccountID
GO

然后使用您之前创建的表类型声明表，添加数据并运行SP：

-- Declare a variable that references the type. 
DECLARE @Temp AS SomeTableType;  

-- Add data to the table variable  
INSERT INTO @Temp VALUES
... 

-- Pass the table variable data to a stored procedure.
EXEC [ACCOUNTTABLE_UPDATE]  @Temp;  
GO

另一种方法是将参数传递为XML：

USE MyDB;  
GO  

CREATE PROCEDURE [ACCOUNTTABLE_UPDATE]  
    @x xml  
AS   
SET NOCOUNT ON  

UPDATE AT
SET SeqNum = t.v.value('@SeqNum','int'), 
    SeqDate = t.v.value('@SeqDate','datetime')
FROM AccountTable AT
INNER JOIN @x.nodes('/row') as t(v)
    ON t.AccountID = t.v.value('@AccountID','varchar(2)')

然后执行它：

DECLARE @x xml = N'<row SeqNum="1" SeqDate="2016-08-01 12:43:08.000" AccountID="AA"/>'

EXEC [ACCOUNTTABLE_UPDATE]  @x;

使用存储过程更新多个记录

1 个答案: