网站关键词密度过高做网站要多少

Mysql基础操作（命令行）

背景

docker安装mysql8，映射本地端口3306

创建数据库

 create database myblog charset=utf8;

选择数据库

use myblog;

查看所有表

show tables;

查看表结构

desc mm_t_user;

show columns from mm_t_user;

向表插入数据

插入第一条

insert into mm_t_user (insert_time,update_time,deleted,number,name,phone,content)
VALUES('2023-11-24','2023-11-24','0','1001','mm','13654854562','很厉害');

插入第二条

insert into mm_t_user (insert_time,update_time,deleted,number,name,phone,content)
VALUES('2023-11-24','2023-11-24','0','1002','Krystal','13654854563','很厉害吗');

插入第三条

insert into mm_t_user (insert_time,update_time,deleted,number,name,phone,content)
VALUES('2023-11-24','2023-11-24','0','1003','ck','13654854564','很帅气');

查询表数据

select * from mm_t_user 

修改表数据

UPDATE mm_t_user SET content='ck' WHERE id=5;

删除表数据

DELETE FROM mm_t_user WHERE id=4;