带group by和having子句的SQL

Question

我有一张桌子

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

在按SALN分组之后，我需要从表A中提取SALN，并且该组仅具有指标A，B，C

SALN
100

请让我知道这个的SQL

Answer 1

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

Answer 2

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

如果您还需要检查SALN是否存在A，B和C，请添加

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

到查询末尾。

Answer 3

如果需要三个值，则可以执行以下操作：

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

如果可以有重复，然后使用：

having count(distinct indicator) = 3

如果你想A，B和C，没有其他价值，再一个办法是：

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