SQL與由具有子句

Question

組和我有一個表阿

ID SALN INDICATOR 
    1 100 A 
    2 100 B 
    3 200 A 
    4 200 C 
    5 100 c 
    6 300 B 
    7 200 D 

我需要通過SALN和具有指示器組A，B的分組之後，從表A中拉SALN，C僅

SALN 
100 

請讓我知道這個

Answer 1

select saln 
from your_table 
group by saln 
having sum(indicator not in ('A','B','C')) = 0 

的SQL如果你還需要檢查，如果A，B和C都存在一個SALN然後添加

and sum(indicator = 'A') > 0 
and sum(indicator = 'B') > 0 
and sum(indicator = 'C') > 0 

到查詢結束。

Answer 2

select saln 
from A 
where indicator in('A','B','C') 
group by saln 
having sum(indicator) = 100 

Answer 3

如果你想這三個值，那麼你可以做：

select saln 
from A 
where indicator in ('A', 'B', 'C') 
group by saln 
having count(*) = 3; 

如果可以有重複，然後使用：

having count(distinct indicator) = 3 

如果你要A，B，和C並且沒有其他值，那麼一種方法是：

select saln 
from A 
group by saln 
having count(distinct case when indicator in ('A', 'B', 'C') then indicator end) = 3;