MySQL查询语句简单操作示例

-- 创建数据库
create database python_test_1 charset=utf8;
-- 使用数据库
use python_test_1;
-- students表
create table students(
  id int unsigned primary key auto_increment not null,
  name varchar(20) default '',
  age tinyint unsigned default 0,
  height decimal(5,2),
  gender enum('男','女','中性','保密') default '保密',
  cls_id int unsigned default 0,
  is_delete bit default 0
);
-- classes表
create table classes (
  id int unsigned auto_increment primary key not null,
  name varchar(30) not null
);