在mysql中，如何找到与所有字段相关的重复行？

如何获取两个字段中重复的行？
提前谢谢

+------------+------------+
| student    | department |
+------------+------------+
| 1234567890 | CS         | 
| 1234567890 | ME         | 
| 1234567890 | CS         | 
| 000000001  | ME         | 
+------------+------------+

+------------+------------+-------+ |学生|系|计数| +------------+------------+-------+ |1234567890 | CS | 2|

---

+------------+------------+-------+ 应该是这样的

+------------+------------+-------+ | student | department | count | +------------+------------+-------+ | 1234567890 | CS | 2 | +------------+------------+-------+ +------------+------------+-------+ | student | department | count | +------------+------------+-------+ | 1234567890 | CS | 2 | +------------+------------+-------+

SELECT  student,
    department      
FROM    Table
GROUP BY student, department
HAVING COUNT(*) > 1

SELECT * 
FROM mytable
GROUP BY student, department
HAVING COUNT( * ) > 1;