SQLite ALL

Last login: Fri Dec  5 09:52:08 on ttys002

BeSilent:~ qianfeng$ sqlite3 data.db

SQLite version 3.7.13 2012-07-17 17:46:21

Enter ".help" for instructions

Enter SQL statements terminated with a ";"

sqlite> create table USER(id,name,score);//创建表

sqlite> .table

USER

sqlite> create table if not exists USER(id,name,score);//创建表

sqlite> .table

USER

sqlite> drop table USER;//删除表

sqlite> create table if not exists USER(id,name,score);

sqlite> .table

USER

sqlite> insert into USER values(1,"普京",90);//插入

sqlite> insert into USER values(2,"奥巴马",50);

sqlite> select *from USER

...> ;

1|普京|90

2|奥巴马|50

sqlite> insert into USER values(3,"神雕",100);

sqlite> insert into USER values(4,"杨过",150);

sqlite> insert into USER values(5,"王丽坤",90);

sqlite> select * from USER;//查询

1|普京|90

2|奥巴马|50

3|神雕|100

4|杨过|150

5|王丽坤|90

sqlite> insert into USER values(6,"陈乔恩",90);

sqlite> select * from USER;

1|普京|90

2|奥巴马|50

3|神雕|100

4|杨过|150

5|王丽坤|90

6|陈乔恩|90

sqlite> delete from USER where id=2;//删除元素

sqlite> select * from USER;

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

6|陈乔恩|90

sqlite> update USER set id=2 where id=6;//修改

sqlite> select *from USER;

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

2|陈乔恩|90

sqlite> update USER set score= 89 where id=2;//修改

sqlite> select *from USER;

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

2|陈乔恩|89

sqlite> select name,score from USER;//查询 name,score

普京|90

神雕|100

杨过|150

王丽坤|90

陈乔恩|89

sqlite> select * from USER limit3;//查询前三项

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

2|陈乔恩|89

sqlite> select * from USER order by id;//通过id 升序查询

1|普京|90

2|陈乔恩|89

3|神雕|100

4|杨过|150

5|王丽坤|90

sqlite> select *from USER;

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

2|陈乔恩|89

sqlite> select * from USER order by score desc;//降序查询

4|杨过|150

3|神雕|100

1|普京|90

5|王丽坤|90

2|陈乔恩|89

sqlite> select * from USER order by name limit 3;

1|普京|90

4|杨过|150

5|王丽坤|90

sqlite> select count(*)from USER;//查询count(*)

5

sqlite> select sum(score) from USER;//查询sum(score)

519

 

sqlite> select avg(score) from USER;//查询avg(score)

103.8

 

sqlite> create table if not exists WUGONG(wid integer primary key autoincrement,name,uid);//wid integer primary key auto increment,多表，主键，外键，唯一键

sqlite> insert into WUGONG(name,uid) values("葵花",5);

sqlite> insert into WUGONG(name,uid) values("独孤九剑",4);

sqlite> insert into WUGONG(name,uid) values("降龙十八掌",3);

sqlite> insert into WUGONG(name,uid) values("黯然销魂掌",2);

sqlite> insert into WUGONG(name,uid) values("一阳指",1);

sqlite> select *from USER;

1|普京|90

3|神雕|100

4|杨过|150

5|王丽坤|90

2|陈乔恩|89

sqlite> select USER.id,USER.name,WUGONG.name,USER.score from USER,WUGONG where USER.id=WUGONG.uid;//多表查询

1|普京|一阳指|90

3|神雕|降龙十八掌|100

4|杨过|独孤九剑|150

5|王丽坤|葵花|90

2|陈乔恩|黯然销魂掌|89

sqlite> select USER.id,USER.name,WUGONG.name,USER.score from USER,WUGONG where USER.id=WUGONG.uid order by USER.score;//多表查询按成绩升序（asc）

2|陈乔恩|黯然销魂掌|89

1|普京|一阳指|90

5|王丽坤|葵花|90

3|神雕|降龙十八掌|100

4|杨过|独孤九剑|150