Question

以下是我正在使用的查询：

select top 1 'Return To IPACS' as name, 'http://domain:88' as link 
union 
select name,link 
from jrm_intranetlinks l 
inner join jrm_intranetpermissions p on l.id = p.linkid 
where p.userid = 155
order by case name when 'Home' then 2 when 'Team' then 1 end desc, name

以下是我收到的错误消息：

Msg 104, Level 16, State 1, Line 1
ORDER BY items must appear in the select list if the statement contains a UNION, INTERSECT or EXCEPT operator.

上面的底部集返回我们用于链接名称的列表，右列提供了它们链接到的路径。我们需要为每个人添加一个默认链接，这就是我们尝试联合部分的原因，因为每个人都会得到这个链接，另一个表根据权限显示链接。

没有order by子句就可以正常工作，但我需要在顶部返回ipacs，然后返回home，然后是团队和休息命令desc。

我在这里做错了什么？

Answer 1

怎么样：

select 
    'Return To IPACS' as name, 
    'http://domain:88' as link, 
    1 as sort_me 
union all
(select 
    name, 
    link, 
    2 as sort_me 
from jrm_intranetlinks l 
inner join jrm_intranetpermissions p on l.id = p.linkid 
where p.userid = 155 )
order by sort_me

我担心你的筑巢。我添加了一些括号。无论如何，重点是你应该只添加如图所示的值来强制排序。

Answer 2

select 
    'Return To IPACS' as name, 
    'www.home.com' as link,
    3 sortOrder
union all
select 
    name, 
    link,
    case name 
        when 'Home' then 2 
        when 'Team' then 1 
    end sortOrder
from links l
inner join jrm_intranetpermissions p on l.id = p.linkid 
where p.userid = 155 
order by sortOrder desc

demo

Answer 3

你有两个不同的“专栏”......

l.[Name]

和

(case [Name] when 'Home' then 2 when 'Team' then 1 end)

......前者在选择列表中而后者不在。

存在一些变通方法。我最喜欢的是......

select top 1 'Return To IPACS' as [Name]
    ,'http://domain:88' as [Link]
    , 3 as [Order]

union 

select l.name as [Name]
    ,l.link as [Link]
    ,(case [Name] when 'Home' then 2 when 'Team' then 1 end) as [Order]
from jrm_intranetlinks l
inner join jrm_intranetpermissions p on l.id = p.linkid 
where p.userid = 155
order by [Order], [Name]

Answer 4

您只是选择“名称”和“链接”，因此当您使用ORDER BY，UNION或{{INTERSECT时，这些是您在EXPECT中可以使用的唯一项目1}}。

换句话说，您需要将“order by”子句中的所有项添加到select语句中。

Answer 5

您是否尝试将其作为内部查询并在外部指定订单？

这样的事情：

select name, link
from (
    select top 1 'Return To IPACS' as name, 'http://domain:88' as link 
    union 
    select name,link 
    from jrm_intranetlinks l 
    inner join jrm_intranetpermissions p on l.id = p.linkid 
    where p.userid = 155
) tbl
order by case name when 'Home' then 2 when 'Team' then 1 end desc, name

Answer 6

select name,link from (
  select
    'Return To IPACS' as name,
    'http://domain:88' as link,
    0 as sort_order
  union 
  select
    name,
    link
    case name when 'Home' then 1 when 'Team' then 2 as sort_order
  from jrm_intranetlinks l 
  inner join jrm_intranetpermissions p on l.id = p.linkid 
  where p.userid = 155
) t
order by sort_order, name

使用Order By时的SQL Union问题

6 个答案: