android学习笔记(18)数据库sqlite初步

打开CMD：依次输入:

sqlite3 mydb.db


1,create
create table t_student(sid INTEGER primary key autoincrement, sname varchar(20));
//autoincrement自增，没有的话从原有ID开始增长 


2,insert
insert into t_student(sid,sname) values(1,'coolszy');


3,select
select sid,sname from t_student;
select sid,sname from t_student order by sid desc;
//递减方式排序
类似上面的有:
group by
having //过渡
limit
select sid,sname from t_student limit 0,2;
//有两个参数，第一个表示起始位，第二个表示长度。


4,update//更新数据
update t_student set sname = 'kuka' where sid = 1;


5,delete
delete from t_student where sid = 2;