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在MySQL中重置AUTO_INCREMENT

2024-04-25 18:18:03 522

截断表以重置AUTO_INCREMENT-

truncate table yourTableName;

让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> Id int NOT NULL AUTO_INCREMENT,
   -> PRIMARY KEY(Id)
   -> );
Query OK, 0 rows affected (0.52 sec)

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.16 sec)

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.09 sec)

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+----+
| Id |
+----+
|  1 |
|  2 |
|  3 |
|  4 |
+----+
4 rows in set (0.00 sec)

以下是重置AUTO_INCREMENT的查询-

mysql> truncate table DemoTable;
Query OK, 0 rows affected (0.80 sec)

Let us insert some records once again. It will by default begin from 1 for AUTO_INCREMENT:

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.16 sec)

mysql> insert into DemoTable values();
Query OK, 1 row affected (0.09 sec)

显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+----+
| Id |
+----+
|  1 |
|  2 |
+----+
2 rows in set (0.00 sec)

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在MySQL中重置AUTO_INCREMENT

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