用逗号分割 sql 参数

Question

以下代码适用于“Main Stream”或“Premium”作为参数，但我试图使其对它们都适用，如下所示，但它不返回任何结果。我怎样才能使下面的代码工作？

declare @myParameter varchar(50)
SET @myParameter = 'Main Stream , Premium'


select * FROM sales  
where myCategory IN (@myParameter)

Answer 1

你可以试试

--Split
DECLARE @textXML XML
DECLARE @data NVARCHAR(MAX), 
        @delimiter NVARCHAR(5)
        
SELECT  @data = 'Main Stream , Premium',
        @delimiter = ','
        
SELECT    @textXML = CAST('<d>' + REPLACE(@data, @delimiter, '</d><d>') + '</d>' AS XML)
SELECT  T.split.value('.', 'nvarchar(max)') AS data
FROM    @textXML.nodes('/d') T(split)

您可以将其存储在临时表中，也可以在 IN 子句中使用它。

对于@Hoy 的评论

你可以看看nodes() Method (xml Data Type)

nodes() 方法在您想要分解 xml 数据类型时很有用 实例到关系数据中。它允许您识别节点 将映射到新行。

另外，看看xml Data Type Methods

你可以把它当作

select * 
FROM    sales  
where   myCategory IN   (
                            SELECT  T.split.value('.', 'nvarchar(max)')
                            FROM    @textXML.nodes('/d') T(split)
                        )

Answer 2

尝试：

select id from dbo.split("24,25,26",',');

所以你需要：

select * FROM sales  
where myCategory IN ( select id from dbo.split(@myParameter,",");

并通过运行在您的数据库中添加拆分功能：

Create FUNCTION [Split](@String varchar(8000), @Delimiter char(1))       
 returns @temptable TABLE (id varchar(8000))       
 as       
  begin       
      declare @idx int       
      declare @slice varchar(8000)       

      select @idx = 1       
          if len(@String)<1 or @String is null  return       

      while @idx!= 0       
      begin       
          set @idx = charindex(@Delimiter,@String)       
          if @idx!=0       
              set @slice = left(@String,@idx - 1)       
          else       
              set @slice = @String       

          if(len(@slice)>0)  
              insert into @temptable(id) values(@slice)       

          set @String = right(@String,len(@String) - @idx)       
          if len(@String) = 0 break       
      end   
  return       
  end
  Go

Answer 3

我在another thread on SO 上找到了类似问题的一个很好的解决方案。
基本上，它使用分隔符（在您的情况下为“,”）拆分字符串（在您的情况下为@MyParameter）。

下面是调用函数的方式：

declare @myParameter varchar(50)
SET @myParameter = 'Main Stream,Premium'

--this table will hold delimited values
DECLARE @ParsedTable TABLE 
(   
        [id] [int] NOT NULL,
        [content] [nvarchar](50) NULL
)
    --Parsing @myParameter
INSERT INTO @ParsedTable
SELECT * from [dbo].[SplitString](@myParameter, ',')
--SELECT * FROM @ParsedTable --This will show you the values... 
--run the query 
select * FROM sales  
where myCategory IN (SELECT content from @ParsedTable)

这里是创建拆分函数的代码：

IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[SplitString]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
DROP FUNCTION [dbo].[SplitString]
go

/****** Object:  UserDefinedFunction [dbo].[SplitString]    Script Date: 11/04/2013 19:04:05 ******/
SET ANSI_NULLS ON
go

SET QUOTED_IDENTIFIER ON
go

CREATE FUNCTION [dbo].[SplitString] 
(
    -- Add the parameters for the function here
    @StringToDelimit nvarchar(500),
    @deliminator nvarchar(2)
)
RETURNS 
@ReturnTable TABLE 
(
    -- Add the column definitions for the TABLE variable here
    [id] [int] IDENTITY(1,1) NOT NULL,
    [content] [nvarchar](50) NULL
)
AS
BEGIN
        Declare @delimitorIdx int
        Declare @content varchar(50)

        --initialize spaces
        Select @delimitorIdx = charindex(@deliminator,@StringToDelimit,0)
        While @delimitorIdx > 0

        Begin
            Select @content = substring(@StringToDelimit,0,charindex(@deliminator,@StringToDelimit,0))

            Insert Into @ReturnTable(content)
            Select @content

            Select @StringToDelimit = substring(@StringToDelimit,charindex(@deliminator,@StringToDelimit,0)+ 1,len(@StringToDelimit) - charindex(' ',@StringToDelimit,0))

            Select @delimitorIdx = charindex(@deliminator,@StringToDelimit,0)
        end

        If len(@StringToDelimit) > 0
            Insert Into @ReturnTable
            Select @StringToDelimit

    RETURN 
END

go

Answer 4

declare @myParameter varchar(50)
SET @myParameter = 'Main Stream , Premium'


select * FROM sales  
where myCategory IN (select * from string_split(@myParameter,','))