存储过程查询无效 [英] Stored procedure query is not working

问题描述

我有一个存储过程，我传递参数如下。

Hi,

I have a stored procedure and I am passing parameter as below.

SqlDataCommand cmd = new SqlDataCommand("dbo.GetCustomer");
cmd.AddParam("@CustomerId", strCustomerId, DbType.String);

获取客户的存储过程查询如下：

Stored procedure query to get customer is as below.

SELECT * FROM Customer WHERE CustomerId IN(@CustomerId)

这里如果我在存储过程中传递单个客户ID它工作正常，但如果我用逗号分隔传递多个客户ID，则不会获取结果。



我通过SQL执行sp Server Management Studio甚至得到相同的结果。

Here if I pass single customer id in stored procedure it is working fine but if I pass multiple customer id with comma separated it is not fetching result.

I executed sp through SQL Server Management Studio even getting same result.

USE [TestDB]
GO

DECLARE	@return_value int

EXEC	@return_value = [dbo].[qa_RK_TransactionsProcess]
		@CustomerId = N'199350029'		
SELECT	'Return Value' = @return_value

GO

上面给出了预期的结果。



但是当我与多个客户执行时如下。

The above give me the expected result.

But when I execute with multiple customer as below.

USE [TestDB]
GO

DECLARE	@return_value int

EXEC	@return_value = [dbo].[qa_RK_TransactionsProcess]
		@CustomerId = N'199350029,199350026'		
SELECT	'Return Value' = @return_value

GO

它不会返回任何结果。

即使我测试了它正在构建的查询如下。但是我不知道它为什么会这样。

It does''nt return any result.
Even I tested the query it is building properly as below. But I don''t know why it is behaving like this.

SELECT * FROM Customer WHERE CustomerId IN(199350029,199350026)

Any非常感谢帮助。

Any help will be very much appreciated.

推荐答案

您需要将csv值转换为表的行，以使其在IN子句中工作。

以下是一个示例

You need to convert the csv value into rows of a table for it to work inside the IN clause.
Here is a sample

DECLARE @Customer TABLE
(
    CustomerId VARCHAR(100),
    CustomerName VARCHAR(100)
)

INSERT INTO @Customer
SELECT 1, 'Bob' UNION ALL
SELECT 2, 'Steve' UNION ALL
SELECT 3, 'Smith' UNION ALL
SELECT 4, 'Matt' UNION ALL
SELECT 5, 'John'


SELECT * FROM @Customer


DECLARE @CustomerId VARCHAR(100)
SET @CustomerID = N'1,3,4'

SELECT * FROM @Customer WHERE CustomerId IN (@CustomerID) --This won't work

SELECT * FROM @Customer WHERE CustomerId IN (SELECT VarcharValue FROM  dbo.ufn_CsvToVarchar(@CustomerID)) --This will work

这是用于将csv值转换为行的函数。

This is the function used to convert csv values into rows.

CREATE Function dbo.ufn_CsvToVarchar ( @Array varchar(MAX))
returns @VarcharTable table
 (VarcharValue varchar(50))
AS
begin

 declare @separator char(1)
 set @separator = ','

 declare @separator_position int
 declare @array_value varchar(1000)

 set @array = @array + ','

 while patindex('%,%' , @array) <> 0
 begin

   select @separator_position =  patindex('%,%' , @array)
   select @array_value = left(@array, @separator_position - 1)

  Insert @VarcharTable
  Values (Cast(@array_value as varchar(50)))

   select @array = stuff(@array, 1, @separator_position, '')
 end

 return
end

希望这会有所帮助。

Hope this helps.

use databasename
create procedure procedurename
(
@CustomerId int 
)
as
begin

SELECT * FROM Customer WHERE CustomerId=@CustomerId

end

尝试此程序

try this procedure

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