sql查询以获取具有多种条件的数据

Question

具有三列的表

A | B | C
1 |11| 0
1 |12| 0
1 |13| 0
2 |33| 5
2 |34| 10
2 |35| 78
5 |45| 0
5 |49| 0
5 |51| 0
8 |10| 0
8 |14| -1
8 |34| -2

我正在寻找SQL查询来获取唯一的A值，该值对于所有B都具有C值ZERO。 （即输出为1和5）

Answer 1

您可以：

select t.*
from table t
where t.c = 0 and
      not exists (select 1 from #tm t1 where t1.a = t.a and t1.c < 0) 

Answer 2

您可以使用group by和having：

select a
from t
group by a
having min(c) = 0 and max(c) = 0;

Answer 3

您可以检查C的平均值是否为0，然后B的所有C值均为零，

SELECT A 
FROM table
GROUP BY A
HAVING SUM(ABS(C))=0

Answer 4

使用NOT EXISTS：

select distinct a from tablename t
where not exists (
  select 1 from tablename 
  where 
    a = t.a
    and
    c <> 0
)

Answer 5

尝试这个：

content_id

Answer 6

尝试一下：

 Select 
 A
 from #tmp
 group by A 
 Having 
 count(*)=count(case when c=0 then 0 else null end)

Answer 7

对于SQL Server：

SELECT A FROM ta
EXCEPT
SELECT A FROM ta WHERE C <> 0