Question

有人可以帮助我，我不知道我做错了什么：

IF EXISTS ( SELECT  name
        FROM    sys.tables
        WHERE   name = N'MemberIdsToDelete' ) 
DROP TABLE [MemberIdsToDelete];
GO

SELECT  mm.memberid ,
        mm.aspnetuserid ,
        mm.email ,
        mm.RowNum AS RowNum
INTO    #MemberIdsToDelete
FROM    membership.members AS mm
        LEFT JOIN aspnet_membership AS asp ON mm.aspnetuserid = asp.userid
        LEFT JOIN trade.tradesmen AS tr ON tr.memberid = mm.memberid
WHERE   asp.isapproved = 0
        AND tr.ImportDPN IS NOT NULL
    AND tr.importDPN <> ''
ORDER BY mm.memberid

DECLARE @MaxRownum INT
SET @MaxRownum = ( SELECT   MAX(RowNum)
                   FROM     #MemberIdsToDelete
                 )

DECLARE @Iter INT
SET @Iter = ( SELECT    MIN(RowNum)
              FROM      #MemberIdsToDelete
            )

DECLARE @MemberId INT
DECLARE @TrademId INT
DECLARE @UId UNIQUEIDENTIFIER
DECLARE @Successful INT
DECLARE @OutputMessage VARCHAR(200)
DECLARE @Email VARCHAR(100)
DECLARE @Username VARCHAR(100)

SELECT  @MemberId = memberId ,
        @UId = AspNetUserId
FROM    MemberIdsToDelete
SELECT  @TrademId = TradesManId
FROM    trade.TradesMen
WHERE   memberId = @MemberId;

WHILE @Iter <= @MaxRownum 
  BEGIN
    SELECT  *
    FROM    #MemberIdsToDelete
    WHERE   RowNum = @Iter
  --more code here
    SET @Iter = @Iter + 1
  END

我只想检查我的表MemberIdsToDelete是否存在，如果是这样的话，使用select中的结果集创建MemberIdsToDelete 循环遍历MemberIdsToDelete表并执行操作

我收到RowNum不存在的错误

Answer 1

该表中没有RowNum列。

尝试：

选择mm.memberid，mm.aspnetuserid，mm.email，row_number（）over（order by（select 1））as RowNum ....

这应该可以解决你的问题，但我实际上并不推荐这种循环删除的想法。

Answer 2

首先，要检查表是否存在然后相应地删除，您需要使用类似

的内容

IF EXISTS (SELECT name 
           FROM sys.tables 
           WHERE name = N'MemberIdsToDelete') 
DROP TABLE [MemberIdsToDelete];
GO

对于错误，当您尝试引用它时，您的RowNum列不存在。将其包含在SELECT语句

中

select mm.memberid, mm.aspnetuserid, mm.email, mm.RowNum AS RowNum    
into #MemberIdsToDelete     
from membership.members as mm      
    left join aspnet_membership as asp       
        on mm.aspnetuserid=asp.userid       
            left join trade.tradesmen as tr       
                on tr.memberid=mm.memberid       
where asp.isapproved = 0 and tr.ImportDPN IS NOT NULL 
    and tr.importDPN <> '' 
order by mm.memberid;
GO

我希望这会有所帮助。

编辑。基于您的评论中的其他错误。您现在正在尝试访问不存在的临时表。在尝试从中读取临时表之前，必须首先填充临时表#MemberIdsToDelete。无效的列错误归结为同样的问题。您正在尝试从临时表中读取一个名为RowNum的列，该列不存在。

EDIT2。从#MemberIdsToDelete中删除“＃”。您正在插入表而不是临时表。或者，在上面的select into中添加＃（请参阅上面的代码）。这将使其成为一个临时表。

Sql脚本语法和语法问题

2 个答案: