mysql学习笔记新建表格，添加字段等

Posted 2023-02-24 智商不够_熬夜来凑

【新建表格】

mysql>use test;//打开test数据库
//创建userInfo表
mysql>CREATE TABLE IF NOT EXISTS `userInfo`(
   `id` INT UNSIGNED AUTO_INCREMENT,
   `user_id` INT NOT NULL,
   `age` INT NOT NULL,
   `interest` VARCHAR(100) NOT NULL,
   `address` VARCHAR(100) NOT NULL,
   PRIMARY KEY ( `id` )
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

【添加字段city】

mysql>alter table userInfo add city varchar(100);