Mysql学习笔记

查看数据库 show database;

创建数据库 Create database db_dbname;

删除数据库 Drop database db_dbname;

创建表     CREATE TABLE t_bookType(

     id int primary key auto_increment,

     bookTypeName varchar(20),

     bookTypeDesc varchar(200)

);

创建关系表   CREATE TABLE t_book(

    id int primary key auto_increment,

    bookName varchar(20),

    author varchar(10),

    price decimal(6,2),

    bookTypeId int,

    constraint `fk` foreign key (`bookTypeId`) references `t_bookType` (`id`)

);

查看表结构

desc t_bookType;

show create table t_bookType;

修改表名

alter table t_book rename t_book2;

修改属性名

alter table t_book change bookName bookName2 varchar(20);

添加属性

alter table t_book add testFiled int first;

alter table t_book add testFiled int after author;

删除字段

alter table t_book drop testFiled;

删除表

drop table t_book;