安卓开发之数据库基本语句

数据库之增删改查

在安卓开发中Sqlite数据库是必学知识，一旦提起数据库，就不得不提数据库的增删改查等基本语句

创建数据表

• create table Tab_name (字段1 数据类型，字段2 数据类型，字段3 数据类型…）；

删除数据表

• drop Tab_name；

增

• insert into Tab_name (字段列表) values (值列表);

删

• delete from Tab_name where [条件];

改

• update Tab_name set 字段 = 值,字段 = 值,字段 = 值 where [];

查

• select 字段列表 from Tab_name where [];

例子：

• Create TABLE teacher(workId text PRIMARY Key,name text,sex text,belongClass int);
• insert into teacher (workId,name,sex,belongClass)values(‘10010’,‘王德发’,‘男’,2018);
• insert into student(number,name,sex,age,address)values(null,‘赵四’,‘男’,null,null);
• delete from student where name=‘赵四’;
• delete from student where age=‘18’;
• insert into teacher(workId,name,sex,belongClass)values(‘100861’,‘刘老师’,‘男’,2);
• select * from teacher ;
• insert into teacher (workId,name,sex,belongClass)values(‘10011’,‘刘庆’,‘女’,2018);
• update teacher set name=‘张三’ where name =‘刘巧巧’;
• update teacher set name = ‘张瑷’ where workId =‘10012’;