Question

我正在尝试获取只有零的所有Id行。

    Id | valid
    ---| ------
    1  | 0
    1  | 1
    2  | 0
    2  | 0
    3  | 1
    4  | 0
    4  | 1
    5  | 0
    6  | 1

Answer 1

SELECT ID
FROM myTable
WHERE Valid = 0
    AND ID NOT IN (
        SELECT ID
        FROM myTable
        WHERE Valid != 0
        )

Answer 2

如果您的Id只有零，那么有效总和将为零。以下是代码示例。

drop table if exists dbo.Table03;

create table dbo.Table03 (
Id int
, valid int
);

insert into dbo.Table03 (Id, valid)
values (1, 0), (1, 1), (2, 0), (2, 0), (3, 1), (4, 0), (4, 1), (5, 0), (6, 1);


select
t.Id
from dbo.Table03 t
group by t.Id
having SUM(t.valid) = 0

Answer 3

您可以LEFT JOIN使用NULL检查来达到预期效果。

使用给定数据执行示例：

DECLARE @TestTable TABLE (Id int, valid int);

INSERT INTO @TestTable (Id, valid)
VALUES (1, 0), (1, 1), (2, 0), (2, 0), (3, 1), (4, 0), (4, 1), (5, 0), (6, 1);

SELECT T1.*
FROM @TestTable T1
LEFT JOIN @TestTable T2 ON T2.Id = T1.Id AND T2.valid <> 0
WHERE T2.Id IS NULL

结果：

Id   valid
----------
2    0
2    0
5    0

如果您只想Id，请使用SELECT DISTINCT T1.Id。

Answer 4

又一个选择

Select A.*
 From YourTable A
 Join (
        Select ID 
         From YourTable 
         Group By ID 
         Having min(valid)=0 and max(valid)=0
       ) B
   on A.ID=B.ID

返回

Id  valid
2   0
2   0
5   0

只有在出现一个时才返回行

4 个答案: