dos下【mysql】的基础操作

（help ?）\h    \?

\q

\c

cls

create database db_name

drop database db_name

无法修改

show databases

use db_name

show create database db_name;

create table `user`(`id` int(11), `username` varchar(20), password varchar(32));

drop table table_name

alter table old_table_name rename new_table_name;

show tables;

show create table table_name;

alter table table_name add table_field_first varchar(32) first;
alter table table_name add table_field_second varchar(32) after table_field_first;

alter table table_name drop table_field;

alter table table_name change old_table_name new_table_name varchar(32);

alter table table_name modify table_field varchar(50);

desc table_name