选择某些列相同但其他列不同的行

Question

我有一个数据集设置如下：

Name	Age	Job	Start	End
Joe	20	Plumber	01/20	08/20
Joe	20	Joiner	08/20	09/21
Kevin	28	Plumber	07/20	08/20
Kevin	28	Plumber	08/20	09/21
Michael	25	Plumber	01/20	11/20
Michael	25	Joiner	11/20	07/21

我正在尝试获取姓名和年龄相同但工作不同的所有行。输出数据集应如下所示：

Name	Age	Job	Start	End
Joe	20	Plumber	01/20	08/20
Joe	20	Joiner	08/20	09/21
Michael	25	Plumber	01/20	11/20
Michael	25	Joiner	11/20	07/21

有人能帮帮我吗？

Answer 1

您可以检查是否有重复的（姓名、年龄）对EXISTS但有不同的工作：

SELECT *
FROM t AS t1
WHERE EXISTS (
    SELECT *
    FROM t AS t2
    WHERE t2.name = t1.name
    AND t2.age = t1.age
    AND t2.job <> t1.job
)

Answer 2

SELECT C.*
  FROM YOUR_TABLE AS C
  JOIN YOUR_TABLE AS C2 ON C.Name=C2.Name AND C.Age=C2.Age AND C.Job<>C2.Job

Selecting rows where some columns are same but others are different