需要由表理清命名

Question

我有一個像下面

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 

下面是我使用來獲得上表中查詢表：

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從具體來表格，我試圖根據這些數據來整理我的數據。我嘗試了不同的案例陳述，但沒有結果。 我想獲得的數據，因此它看起來象下面這樣：使用common table expression

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

要給你聚集，然後用case表達與exists()確定dialnum存在於哪些表

;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 

。

---

刻錄而不common table expression：

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。只需在結果中添加一個靜態列即可。

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