Question

我有一个这样的存储过程：

ALTER PROCEDURE [dbo].[ParkingDeatailsReportnew] 
 @startdate NVARCHAR(100),
  @enddate NVARCHAR(100)AS BEGINDECLARE  @cols AS NVARCHAR(MAX) , @query AS NVARCHAR(MAX)
 SELECT @cols = STUFF((  SELECT DISTINCT ',' + QUOTENAME(Vtype)
  FROM dbo.VType_tbl FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
 SET @query =
    'SELECT  LocName,Date, ' + @cols + '
     from  ( 
            select  l.LocName,v.Vtype, convert(date, dtime) as Date 
            from Transaction_tbl t 
            join VType_tbl v on t.vtid = v.vtid 
where dtime between ''' + @startdate + ''' and ''' + @enddate + ''' 
                and locid IN (SELECT l.Locid FROM dbo.Location_tbl l)
    ) d pivot ( count(Vtype) for Vtype in (' + @cols + ')  ) p '  
EXEC sys.sp_executesql @query
END

执行时我得到这样的错误：

无法绑定多部分标识符“l.LocName”。

如何解决此问题？

Answer 1

很简单。您的外部查询未从l L表中选择任何内容。您只在and locid IN (...)子查询中使用它。您不能在父查询中使用该子查询中的任何字段，只能在l.locid字段中使用EXCEPT，并且只能在IN (...)比较中使用。

Answer 2

要获取locname，而不是使用子查询，请在连接中使用表名。以下是样本：

ALTER PROCEDURE [dbo].[ParkingDeatailsReportnew] 
 @startdate NVARCHAR(100),
  @enddate NVARCHAR(100)AS BEGINDECLARE  @cols AS NVARCHAR(MAX) , @query AS NVARCHAR(MAX)
 SELECT @cols = STUFF((  SELECT DISTINCT ',' + QUOTENAME(Vtype)
  FROM dbo.VType_tbl FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
 SET @query =
    'SELECT  LocName,Date, ' + @cols + '
     from  ( 
            select  l.LocName,v.Vtype, convert(date, dtime) as Date 
            from Transaction_tbl t 
            join VType_tbl v on t.vtid = v.vtid 
            join dbo.Location_tbl l on t.locid=l.Locid
where dtime between ''' + @startdate + ''' and ''' + @enddate + ''' 
                    ) d pivot ( count(Vtype) for Vtype in (' + @cols + ')  ) p '  
EXEC sys.sp_executesql @query
END

在这里，我删除了子查询，并在LocId列上使用Transaction_tbl加入了Location_tbl。

执行存储过程时显示的多部分标识符错误

2 个答案: