linux mysql 删除自增序列的字段后后，重新排序

mysql> select * from stu_info1;
+----+----------+------------+-------------+
| id | name     | birth      | tel         |
+----+----------+------------+-------------+
|  1 | ztq      | 1994-12-29 | 159****0773 |
|  2 | tqz      | 1994-11-27 | 159****0773 |
|  3 | fq       | 1994-05-23 | 187****8793 |
|  4 | qf       | 1994-05-23 | 187****8793 |
|  5 | 123      | 1998-12-12 | 14          |
|  6 | 12312323 | 1998-12-12 | 14          |
+----+----------+------------+-------------+

mysql> delete from stu_info1  where id = 5;
Query OK, 1 row affected (0.02 sec)

mysql> select * from stu_info1;
+----+----------+------------+-------------+
| id | name     | birth      | tel         |
+----+----------+------------+-------------+
|  1 | ztq      | 1994-12-29 | 159****0773 |
|  2 | tqz      | 1994-11-27 | 159****0773 |
|  3 | fq       | 1994-05-23 | 187****8793 |
|  4 | qf       | 1994-05-23 | 187****8793 |
|  6 | 12312323 | 1998-12-12 | 14          |
+----+----------+------------+-------------+


mysql> alter table stu_info1 drop id;
Query OK, 5 rows affected (0.33 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> select * from stu_info1;
+----------+------------+-------------+
| name     | birth      | tel         |
+----------+------------+-------------+
| ztq      | 1994-12-29 | 159****0773 |
| tqz      | 1994-11-27 | 159****0773 |
| fq       | 1994-05-23 | 187****8793 |
| qf       | 1994-05-23 | 187****8793 |
| 12312323 | 1998-12-12 | 14          |
+----------+------------+-------------+
5 rows in set (0.00 sec)

mysql> alter table stu_info1
    -> add id int unsigned not null auto_increment first,                                       -> add primary key(id);                                                                 Query OK, 0 rows affected (0.40 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> select * from stu_info1;
+----+----------+------------+-------------+
| id | name     | birth      | tel         |
+----+----------+------------+-------------+
|  1 | ztq      | 1994-12-29 | 159****0773 |
|  2 | tqz      | 1994-11-27 | 159****0773 |
|  3 | fq       | 1994-05-23 | 187****8793 |
|  4 | qf       | 1994-05-23 | 187****8793 |
|  5 | 12312323 | 1998-12-12 | 14          |
+----+----------+------------+-------------+
5 rows in set (0.00 sec)