SQL – create

• database 操作
  

  create dateabase test;
  use test;
  show databases;
  show create database test;
  drop database test;
  

  create database if not exists test;
  

• table 操作
  

  use test;
  
  create table user1 (
  id int not null,
  username varchar(20) not null
  ) engine=innodb default charset=utf8;
  

  show tables;
  desc user1;
  select * from user1;
  

• character
  

  create database if not exists test character set gbk;
  alter database test character set utf8;
  

  create table ... (
  ..
  ) ENGINE=InnoDB default charset=gbk;
  

  show create table user1;
  alter table user1 character set utf8;
  

  create database if not exists test character set gbk;
  alter database test character set utf8;
  

  gbk 老写成 gtk 无语 T_T