MySQL创建表操作命令分享

show tables;

CREATE TABLE table_name (
    column1_name data_type constraints,
    column2_name data_type constraints,
    ....
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE users (
    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50) NOT NULL,
    birth_date DATE,
    phone VARCHAR(11) NOT NULL UNIQUE
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

show engines;

desc 表名;

show create table '表名';

rename table 原表名 to 新表名;

alter table 表名 add|change|drop 列名 类型;

alter table users add age int default 1;

alter table users add user_desc varchar(50) default '哈哈';
alter table users change user_desc userdesc varchar(50);

alter table users drop userdesc

drop table 表名;

CREATE TABLE users1 (
    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50),
    birth_date DATE,
    phone VARCHAR(11)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

ALTER TABLE users1 ADD UNIQUE (phone);

ALTER TABLE users1 DROP INDEX phone;

ALTER TABLE users1 modify name VARCHAR(50) not null;

ALTER TABLE users1 
CHANGE COLUMN `name` `name` VARCHAR(50) NULL ;

ALTER TABLE users1 ALTER birth_date SET DEFAULT '1992-05-11';

ALTER TABLE users1 ALTER birth_date DROP DEFAULT;