转载自:定义以及示例请见 : http://www.runoob.com/sqlite/sqlite-autoincrement.html

SQLite Autoincrement(自动递增)

SQLite 的 AUTOINCREMENT 是一个关键字,用于表中的字段值自动递增。我们可以在创建表时在特定的列名称上使用 AUTOINCREMENT 关键字实现该字段值的自动增加。

关键字 AUTOINCREMENT 只能用于整型(INTEGER)字段。

实例

假设要创建的 COMPANY 表如下所示:

sqlite> CREATE TABLE COMPANY(
ID INTEGER PRIMARY KEY AUTOINCREMENT,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL
);

现在,向 COMPANY 表插入以下记录:

INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Paul', 32, 'California', 20000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ('Allen', 25, 'Texas', 15000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ('Teddy', 23, 'Norway', 20000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Mark', 25, 'Rich-Mond ', 65000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'David', 27, 'Texas', 85000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'Kim', 22, 'South-Hall', 45000.00 ); INSERT INTO COMPANY (NAME,AGE,ADDRESS,SALARY)
VALUES ( 'James', 24, 'Houston', 10000.00 );

这将向 COMPANY 表插入 7 个元组,此时 COMPANY 表的记录如下:

ID          NAME        AGE         ADDRESS     SALARY
---------- ---------- ---------- ---------- ----------
1 Paul 32 California 20000.0
2 Allen 25 Texas 15000.0
3 Teddy 23 Norway 20000.0
4 Mark 25 Rich-Mond 65000.0
5 David 27 Texas 85000.0
6 Kim 22 South-Hall 45000.0
7 James 24 Houston 10000.0
05-11 11:27