Question

我有一张如下表格

termnum       dialnum         carrier         cic            mou 
8007779898    8007779898      LEVEL3          432          86,466 
8886605890    8886605890      LEVEL3          5102         83,302 
8779069811    8779069811      LEVEL3          432          69,955 
8779069811    8779069811      LEVEL3          432          69,955

以下是我用于获取上表的查询：

select c.termnum, c.dialnum, c.carrier, c.cic, sum(c.calldur)/60

from tablec c
left join  tablea a
on c.dialnum = a.NUMBER8XX 
group by c.termnum, c.dialnum, c.carrier, c.cic

union 

select c.termnum, c.dialnum, c.carrier, c.cic, sum(c.calldur)/60

from tablec c
left join  tableb b
on c.dialnum = b.NUMBER8XX 
group by c.termnum, c.dialnum, c.carrier, c.cic

Termnum和dianlnum来自特定的表格，我正在尝试根据这一点来整理我的数据。我尝试了不同的案例陈述但没有结果。我试图获取数据，如下所示：

termnum         dialnum         carrier     cic    mou    table a      table b
8007779898     8007779898        LEVEL3     432    86,466    X  
8886605890     8886605890        LEVEL3     5102   83,302                X
8779069811     8779069811        LEVEL3     432    69,955    X           X

Answer 1

使用common table expression来汇总您的聚合，然后使用case表达式exists()来确定哪些表格dialnum。

;with cte as (
  select c.termnum, c.dialnum ,c.carrier ,c.cic ,sum(c.calldur)/60 as mou
  from tablec c
  group by c.termnum, c.dialnum, c.carrier, c.cic
)
select c.*
  , table_a = case when exists (select 1 from tablea a where a.NUMBER8XX = c.dialnum) then 'x' else '' end
  , table_b = case when exists (select 1 from tableb b where b.NUMBER8XX = c.dialnum) then 'x' else '' end
from cte c

没有common table expression编写：

select c.*
  , table_a = case when exists (select 1 from tablea a where a.NUMBER8XX = c.dialnum) then 'x' else '' end
  , table_b = case when exists (select 1 from tableb b where b.NUMBER8XX = c.dialnum) then 'x' else '' end
  from (
    select c.termnum, c.dialnum ,c.carrier ,c.cic ,sum(c.calldur)/60 as mou
    from tablec c
    group by c.termnum, c.dialnum, c.carrier, c.cic 
      ) c

Answer 2

根本不需要case。只需在结果中添加静态列。

select c.termnum, c.dialnum, c.carrier, c.cic, sum(c.calldur)/60, 'A' as SourceTable

from tablec c
left join  tablea a
on c.dialnum = a.NUMBER8XX 
group by c.termnum, c.dialnum, c.carrier, c.cic

union 

select c.termnum, c.dialnum, c.carrier, c.cic, sum(c.calldur)/60,  'B' as SourceTable

from tablec c
left join  tableb b
on c.dialnum = b.NUMBER8XX 
group by c.termnum, c.dialnum, c.carrier, c.cic

需要按表格

2 个答案: