Question

我想查询以逗号分隔的值列表。但是我收到了一个错误：

SELECT
    nCmpID, cCompanyName  
FROM 
    (SELECT * 
     FROM tbl_CompanyMaster  
     WHERE nCmpID IN (SELECT * 
                      FROM dbo.fnsplit((SELECT can_AccessCompanyID 
                                        FROM tbl_UserMenuRelations 
                                        WHERE nUserID = 0 
                                          AND Is_Active = 1 
                                          AND Is_Available = 1), ',') a) 
       AND Is_Active = 1) t

我的功能FNSplit：

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER FUNCTION [dbo].[fnSplit]
    (@sInputList VARCHAR(8000), -- List of delimited items
     @sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items
    ) 
RETURNS @List TABLE (item VARCHAR(8000))
BEGIN
    DECLARE @sItem VARCHAR(8000)

    WHILE CHARINDEX(@sDelimiter, @sInputList, 0) <> 0
    BEGIN
        SELECT
            @sItem = RTRIM(LTRIM(SUBSTRING(@sInputList, 1, CHARINDEX(@sDelimiter, @sInputList, 0) - 1))),
            @sInputList = RTRIM(LTRIM(SUBSTRING(@sInputList, CHARINDEX(@sDelimiter, @sInputList, 0) + LEN(@sDelimiter), LEN(@sInputList))))

        IF LEN(@sItem) > 0
           INSERT INTO @List 
               SELECT @sItem
        END

        IF LEN(@sInputList) > 0
           INSERT INTO @List 
               SELECT @sInputList -- Put the last item in

        RETURN
END

我收到这些错误：

Msg 102，Level 15，State 1，Line 2
  '（'。
附近的语法不正确
Msg 102，Level 15，State 1，Line 3
  '，'。
附近的语法不正确

Answer 1

试试这个

SELECT
    nCmpID, cCompanyName  
FROM 
    (SELECT * 
     FROM tbl_CompanyMaster  
     WHERE nCmpID IN (SELECT * 
                      FROM dbo.fnsplit((SELECT can_AccessCompanyID 
                                        FROM tbl_UserMenuRelations 
                                        WHERE nUserID = 0 
                                          AND Is_Active = 1 
                                          AND Is_Available = 1), ',')) 
       AND Is_Active = 1) t

你的代码中有一个无用的a）

Answer 2

<强>答案

如果动态查询

，则需要使用

Declare @Query varchar(8000)

Declare @CommaSeparatedList varchar(8000)

- 使用字符串变量存储拆分函数的结果。

Set @CommaSeparatedList =(SELECT * 
                  FROM dbo.fnsplit((SELECT can_AccessCompanyID 
                                    FROM tbl_UserMenuRelations 
                                    WHERE nUserID = 0 
                                      AND Is_Active = 1 
                                      AND Is_Available = 1), ','))

SET @Query='SELECT
nCmpID, cCompanyName  
FROM 
(SELECT * 
 FROM tbl_CompanyMaster  
 WHERE nCmpID IN ('+@CommaSeparatedList+') a) 
   AND Is_Active = 1) t' 

 Exec(@Query)

Answer 3

在使用用户定义的函数dbo.fnsplit时，语法错误。

您应该使用游标逐行执行。

DECLARE @name VARCHAR（100）

DECLARE记录CURSOR FOR SELECT name FROM emp 开放记录

FETCH NEXT FROM记录INTO @name

WHILE @@ FETCH_STATUS = 0 BEGIN 从dbo.fnsplit中选择*（@ name，'，'） FETCH NEXT FROM记录INTO @name 结束关闭记录
DEALLOCATE记录

Answer 4

如果你不需要，不要重新发明轮子。

Jeff Moden的CSV字符串拆分器表值函数示例：

create function [dbo].[delimitedsplit8K] (
      @pstring varchar(8000)
    , @pdelimiter char(1)
  )
returns table with schemabinding as
 return
  with e1(N) as (
    select 1 union all select 1 union all select 1 union all 
    select 1 union all select 1 union all select 1 union all 
    select 1 union all select 1 union all select 1 union all select 1
  )
  , e2(N) as (select 1 from e1 a, e1 b)
  , e4(N) as (select 1 from e2 a, e2 b)
  , ctetally(N) as (
    select top (isnull(datalength(@pstring),0)) 
      row_number() over (order by (select null)) from e4
  )
  , ctestart(N1) as (
    select 1 union all
    select t.N+1 from ctetally t where substring(@pstring,t.N,1) = @pdelimiter
  )
  , ctelen(N1,L1) as (
    select s.N1,
      isnull(nullif(charindex(@pdelimiter,@pstring,s.N1),0)-s.N1,8000)
    from ctestart s
  )
 select itemnumber = row_number() over(order by l.N1)
      , item       = substring(@pstring, l.N1, l.L1)
   from ctelen l
;
go

并像这样使用：

select cm.nCmpID, cm.cCompanyName 
from tbl_CompanyMaster cm
where cm.Is_Active = 1 
  and cm.nCmpId in (
    select s.Item
    from tbl_UserMenuRelations umr
      cross apply dbo.delimitedsplit8K(umr.can_AccessCompanyId,',') s
    where umr.nUserId = 0 
      and umr.Is_Active = 1 
      and umr.Is_Available = 1
    )

拆分字符串参考：

SQL Server中的函数拆分导致错误

4 个答案: