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在MySQL中创建表时在表中设置AUTO_INCREMENT？

2024-04-25 12:43:05 491

让我们首先创建一个表。我们在创建表时使用了AUTO_INCREMENT来设置StudentId的自动增量-

mysql> create table DemoTable
   -> (
   -> StudentId int NOT NULL AUTO_INCREMENT,
   -> StudentFirstName varchar(100),
   -> StudentLastName varchar(100),
   -> StudentAge int,
   -> StudentCountryName varchar(100),
   -> PRIMARY KEY(StudentId)
   -> )AUTO_INCREMENT=30;

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable(StudentFirstName,StudentLastName,StudentAge,StudentCountryName) values('John','Smith',21,'US');

mysql> insert into DemoTable(StudentFirstName,StudentLastName,StudentAge,StudentCountryName) values('Chris','Brown',20,'AUS');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+-----------+------------------+-----------------+------------+--------------------+
| StudentId | StudentFirstName | StudentLastName | StudentAge | StudentCountryName |
+-----------+------------------+-----------------+------------+--------------------+
| 30        | John             | Smith           | 21         | US                 |
| 31        | Chris            | Brown           | 20         | AUS                |
+-----------+------------------+-----------------+------------+--------------------+
2 rows in set (0.00 sec)

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在MySQL中创建表时在表中设置AUTO_INCREMENT？

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