5 rows in set
mysql> select a1.* from a a1 right join (select max(id) id from a group by name) a2 on a1.id = a2.id where a1
.id is not null;
+----+------+--------------+
| id | name | descri |
+----+------+--------------+
| 3 | a3 | 我是a3 |
| 4 | a1 | 我是第二个a1 |
| 5 | a2 | 我是第二个a2 |
+----+------+--------------+
3 rows in set
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