在MySQL中创建表时在表中设置AUTO_INCREMENT？
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)