Question

说我有下表

ID | Trans_id 
1  | 10
2  | 20 
2  | 20
2  | 20
2  | 20
2  | 10
3  | 20
4  | 20
5  | 10
6  | 10

如何选择trans_id包含20 且具有另一个不同数字的ID，无论它是什么（在此示例中，我应仅返回ID 2）？

Answer 1

您可以使用聚合和having：

select id
from t
group by id
having sum(case when trans_id = 20 then 1 else 0 end) > 0 and
       sum(case when trans_id <> 20 then 1 else 0 end) > 0;

Answer 2

或者，使用exists

Select distinct Id from table t
Where trans_id = 20
   and exists (Select * from table 
               Where ID = t.Id
                  and trans_id != 20)

Answer 3

您可以使用此查询：

SELECT ID
FROM Table1
WHERE ID IN (SELECT DISTINCT ID FROM Table1 WHERE Trans_id = 20)
GROUP BY ID
HAVING COUNT(DISTINCT(Trans_id)) > 1

子查询仅选择包含Trans_id = 20的ID，GROUP BY ID + HAVING COUNT(DISTINCT(Trans_id)) > 1确保此组中还有其他Trans_id。

Answer 4

这将有效：

   SELECT DISTINCT ID FROM MyTable WHERE Trans_id = 20

选择字段包含特定项目和其他任何项目

4 个答案: