标签:tty out 名称 div strong any res ext intro
定义以及示例请见 : http://www.runoob.com/sqlite/sqlite-autoincrement.html
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。
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
[QT][SQL]sql学习记录5_sqlite Autoincrement(自动递增)
标签:tty out 名称 div strong any res ext intro
原文地址:http://www.cnblogs.com/ourran/p/6830737.html