Union All查询的语法不正确

Question

我正在尝试与union all结合使用查询：

use SalesDWH
go


select cast(COUNT([specimen id]) as varchar) +'|'+[practice name]+'|'+b.[mlis practice id]+'|'+[practice code]+'|'+[Requesting Physician]+'|'+c.salesrep+'|'+
    cast(c.dateestablished as varchar)+'|'+ c.practicecity+'|'+c.practicestate
from quicklabdump a
    inner join qlmlismapping b
    on (b.[quiklab practice code] = a.[practice code])
    inner join PracticeandPhysician c
    on (a.[Requesting Physician]=c.doctorfirstname+' '+c.DOCTORLASTNAME
        and a.[practice code]=c.practicecode)
where   DATEPART(yy, [DATE entered]) = 2011
    and DATEPART(mm, [DATE entered]) = 12
group by a.[practice name],b.[mlis practice id],a.[practice code],
    a.[Requesting Physician],c.salesrep,c.dateestablished, c.practicecity,c.practicestate
order by COUNT([specimen id]) desc

union all

select cast(COUNT([specimen id]) as varchar) +'|'+[practice name]+'|'+b.[mlis practice id]+'|'+[practice code]+'|'+[Requesting Physician]+'|'+c.salesrep+'|'+
    cast(c.dateestablished as varchar)+'|'+ c.practicecity+'|'+c.practicestate
from quicklabdump a
    inner join qlmlismapping b
    on (b.[quiklab practice code] = a.[practice code])
    inner join PracticeandPhysician c
    on (a.[Requesting Physician]=c.doctorfirstname+' '+c.DOCTORLASTNAME
        and a.[practice code]=c.practicecode)
where   DATEPART(yy, [DATE entered]) = 2011
    and DATEPART(mm, [DATE entered]) = 11
group by a.[practice name],b.[mlis practice id],a.[practice code],
    a.[Requesting Physician],c.salesrep,c.dateestablished, c.practicecity,c.practicestate
order by COUNT([specimen id]) desc

但是我收到了这个错误：

Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'union'.

我做错了什么？

Answer 1

你的order by只能发表最后一句话：

use SalesDWH
go


select cast(COUNT([specimen id]) as varchar) +'|'+[practice name]+'|'+b.[mlis practice id]+'|'+[practice code]+'|'+[Requesting Physician]+'|'+c.salesrep+'|'+
    cast(c.dateestablished as varchar)+'|'+ c.practicecity+'|'+c.practicestate
from quicklabdump a
    inner join qlmlismapping b
    on (b.[quiklab practice code] = a.[practice code])
    inner join PracticeandPhysician c
    on (a.[Requesting Physician]=c.doctorfirstname+' '+c.DOCTORLASTNAME
        and a.[practice code]=c.practicecode)
where   DATEPART(yy, [DATE entered]) = 2011
    and DATEPART(mm, [DATE entered]) = 12
group by a.[practice name],b.[mlis practice id],a.[practice code],
    a.[Requesting Physician],c.salesrep,c.dateestablished, c.practicecity,c.practicestate

union all

select cast(COUNT([specimen id]) as varchar) +'|'+[practice name]+'|'+b.[mlis practice id]+'|'+[practice code]+'|'+[Requesting Physician]+'|'+c.salesrep+'|'+
    cast(c.dateestablished as varchar)+'|'+ c.practicecity+'|'+c.practicestate
from quicklabdump a
    inner join qlmlismapping b
    on (b.[quiklab practice code] = a.[practice code])
    inner join PracticeandPhysician c
    on (a.[Requesting Physician]=c.doctorfirstname+' '+c.DOCTORLASTNAME
        and a.[practice code]=c.practicecode)
where   DATEPART(yy, [DATE entered]) = 2011
    and DATEPART(mm, [DATE entered]) = 11
group by a.[practice name],b.[mlis practice id],a.[practice code],
    a.[Requesting Physician],c.salesrep,c.dateestablished, c.practicecity,c.practicestate
order by COUNT([specimen id]) desc

这是因为在达到结果集之后会发生排序，即结合后。在最终返回之前，你不能订购一套。

Answer 2

删除第一个

order by COUNT([specimen id]) desc

或者这样做：

select cDATEPART(mm, [DATE entered]) as Month, cast(COUNT([specimen id]) as varchar) +'|'+[practice name]+'|'+b.[mlis practice id]+'|'+[practice code]+'|'+[Requesting Physician]+'|'+c.salesrep+'|'+
    cast(c.dateestablished as varchar)+'|'+ c.practicecity+'|'+c.practicestate
from quicklabdump a
    inner join qlmlismapping b
    on (b.[quiklab practice code] = a.[practice code])
    inner join PracticeandPhysician c
    on (a.[Requesting Physician]=c.doctorfirstname+' '+c.DOCTORLASTNAME
        and a.[practice code]=c.practicecode)
where   DATEPART(yy, [DATE entered]) = 2011
    and DATEPART(mm, [DATE entered]) in (11,12)
group by DATEPART(mm, [DATE entered]), a.[practice name],b.[mlis practice id],a.[practice code],
    a.[Requesting Physician],c.salesrep,c.dateestablished, c.practicecity,c.practicestate
order by COUNT([specimen id]) desc

您也可以说

之类的内容

select CASE WHEN cDATEPART(mm, [DATE entered]) = 11 THEN 'The 11th Month' 
           WHEN cDATEPART(mm, [DATE entered]) = 12 THEN 'The 12th Month' END as [when], ...