在 MySQL 中使用 ZEROFILL 设置自定义自动增量

Mysql> create table DemoTable1831
     (
     UserId int(7) zerofill auto_increment,
     PRIMARY KEY(UserId)
     );
Query OK, 0 rows affected (0.00 sec)

mysql> insert into DemoTable1831 values(101);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1831 values();
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1831 values();
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1831 values();
Query OK, 1 row affected (0.00 sec)

mysql> select * from DemoTable1831;

+---------+
| UserId  |
+---------+
| 0000101 |
| 0000102 |
| 0000103 |
| 0000104 |
+---------+
4 rows in set (0.00 sec)