mysql常见操作

Posted 2021-05-17 vieber

创建数据库

CREATE DATABASE 数据库名;

创建数据表

CREATE TABLE IF NOT EXISTS `runoob_tbl`(
   `runoob_id` INT UNSIGNED AUTO_INCREMENT,
   `runoob_title` VARCHAR(100) NOT NULL,
   `runoob_author` VARCHAR(40) NOT NULL,
   `submission_date` DATE,
   PRIMARY KEY ( `runoob_id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

删除数据库表

DROP TABLE table_name

查看表信息

desc 表名

设置自增主键

alter table t1 change column id id int not null primary key auto_increment;