mysql常见命令？
查看多少库存在？
show databases;
SRE实战 互联网时代守护先锋，助力企业售后服务体系运筹帷幄！一键直达领取阿里云限量特价优惠。建库： create database yintao; 查看 show databases; 使用库 use yintao; 建表 create table students( id int unsigned not null auto_increment primary key, name char(8) not null, sex char(4) not null, age tinyint unsigned not null, tel char(13) null default "-" ); 查看 show tables; desc students; 增 insert insert [into] 表名 [(列名1, 列名2, 列名3, ...)] values (值1, 值2, 值3, ...); insert into students values(NULL, "王刚", "男", 20, "13811371377"); insert into students (name, sex, age) values("孙丽华", "女", 21); 删 delete delete from 表名称 where 删除条件; delete from students; delete from students where id=2; delete from students where age<20; 改 update update 表名称 set 列名称=新值 where 更新条件; update students set tel=default where id=5; update students set age=age+1; update students set name="张伟鹏", age=19 where tel="13288097888"; 查 select select 列名称 from 表名称 [查询条件]; select name, age from students; select * from students; select * from students where age > 21; select * from students where name like "%王%"; select * from students where id<5 and age>20;
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