Question

我在MSSQL 2008中有一个查询，如：

IF OBJECT_Id('tempdb..#AccessibleFacilities') IS NOT NULL DROP TABLE #AccessibleFacilities
SELECT u.Userid
     , AccesibleFacilityIds = dbo.GetCommaDelimitedString(upf.Facility_Id)  
INTO #AccessibleFacilities   
FROM Users u
INNER join UserProfileFacilities upf on upf.UserProfile_Id = up.Id  
WHERE LOWER(u.Userid) = LOWER(@userId)
GROUP BY u.Userid

此查询返回",1,2,3,4,5,6,"之类的AccessibleFacilityIds。请注意，我无法修改GetCommaDelimitedString函数。

我实际需要做的是使用这些设施ID来达到如下所示：

INSERT INTO #AccessibleProvs
    SELECT Userid = @userId
         , AccessibleProvIds = dbo.GetCommaDelimitedString(distinct p.Id) 
    FROM Provs p 
         inner join ProvFacs pf on p.Id = pf.Provider_Id
    WHERE pf.Facility_Id in 
          (select a.AccesibleFacilityIds from #AccessibleFacilities a)

然而，它给我一个错误：

转换nvarchar值时转换失败'，1,2,3,4,5,6，' 数据类型int。

我尝试在开头和结尾删除逗号标记，如下所示修复它，但它没有帮助：

...
where pf.Facility_Id in (
      select SUBSTRING(a.AccesibleFacilityIds,2,LEN(a.AccesibleFacilityIds)-2) 
      from #AccessibleFacilities a
     )

任何建议都将不胜感激。感谢。

Answer 1

为什么不将它作为临时表中的可用列保存，而不是将Facility_Id转换为逗号分隔的字符串？

if object_Id('tempdb..#AccessibleFacilities') is not null drop table #AccessibleFacilities;
select 
    u.UserId
  , upf.Facility_Id
into #AccessibleFacilities
from Users u
  inner join UserProfileFacilities upf 
    on upf.UserProfile_Id = up.Id

然后像使用in()或exists()一样使用它：

insert into #AccessibleProvs
select 
    UserId = @userId
  , AccessibleProvIds = dbo.GetCommaDelimitedString(distinct p.Id) 
from Provs p 
  inner join ProvFacs pf 
    on p.Id = pf.Provider_Id
where exists (
   select 1
   from #AccessibleFacilities a
   where a.Facility_Id = pf.Facility_Id
     --and a.UserId = @UserId -- Do you need to check Facility_Id by User?
   )

如果您在开头有@UserId的值，则可以将临时表使用限制为您需要的用户。希望这段代码不适用于某种游标或其他循环。

使用ID“在（...）中的ID”，nvarchar到int时转换失败

1 个答案: