mysql -h192.168.137.10 -uroot -p123
mysql -uroot -p123
mysqladmin -uroot -p password "redhat"
mysqladmin -uroot -predhat password "123"
grant all on *.* to zhang@"%" identified by "redhat";
mysql -uzhang-predhat
create database luzhi default character set utf8;
create database luzhi1 character set utf8;
drop database luzhi;
drop database if exists luzhi1;
create database if not exists luzhi444;
drop database if exists luzhi444;
use mysql;
show tables;
select * from user;
desc user;
select database();
select version();
select dayofmonth(current_date);
mysql>use mytest;
mysql> create table myclass(
-> id int(4) not null primary key auto_increment,
-> name char(20) not null,
-> sex int(3) not null default 0,
-> degree double(16,2));
mysql> insert into MyClass values(1,'Tom',96.45),(2,'Joan',82.99), (2,'Wang', 96.59);
select * from MyClass;
select * from MyClass order by id limit 0,2;
mysql> delete from MyClass where id=1;
php操作：
<?php
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
mysql_query("DELETE FROM Persons WHERE LastName='Griffin'"); mysql_close($con);
?>
mysql> update MyClass set name='Mary' where id=1;
mysql> alter table MyClass add passtest int(4) default '0'；
mysql> rename table MyClass to YouClass;
create user guest@localhost identified by ’123456′；
grant select on mydb.* to guest@localhost;
drop user guest;
grant select, insert, update, delete on new_db.* to guest@’%’ identified by ’88888888′;
實例1
drop database if exists school; //如果存在SCHOOL則刪除
create database school; //建立庫SCHOOL
use school; //打開庫SCHOOL
create table teacher //建立表TEACHER
(
id int(3) auto_increment not null primary key,
name char(10) not null,
address varchar(50) default ‘深圳’,
year date
); //建表結束
//以下爲插入字段
insert into teacher values(”,’allen’,'大連一中’,'1976-10-10′);
insert into teacher values(”,’jack’,'大連二中’,'1975-12-23′);
如果你在mysql提示符鍵入上面的命令也可以，但不方便調試。
1、你可以將以上命令原樣寫入一個文本文件中，假設爲school.sql，然後複製到c:\\下，並在DOS狀態進入目錄[url=file://\\mysql\\bin]\\mysql\\bin[/url]，然後鍵入以下命令：
mysql -uroot -p密碼 < c:\\school.sql
如果成功，空出一行無任何顯示；如有錯誤，會有提示。（以上命令已經調試，你只要將//的註釋去掉即可使用）。
2、或者進入命令行後使用 mysql> source c:\\school.sql; 也可以將school.sql文件導入數據庫中。
實例2
drop database if exists school; //如果存在SCHOOL則刪除
create database school; //建立庫SCHOOL
use school; //打開庫SCHOOL
create table teacher //建立表TEACHER
(
id int(3) auto_increment not null primary key,
name char(10) not null,
address varchar(50) default ''深圳'',
year date
); //建表結束
//以下爲插入字段
insert into teacher values('''',''glchengang'',''深圳一中'',''1976-10-10'');
insert into teacher values('''',''jack'',''深圳一中'',''1975-12-23'');
注：在建表中
1、將ID設爲長度爲3的數字字段:int(3)；並讓它每個記錄自動加一:auto_increment；並不能爲空:not null；而且讓他成爲主字段primary key。
2、將NAME設爲長度爲10的字符字段
3、將ADDRESS設爲長度50的字符字段，而且缺省值爲深圳。
4、將YEAR設爲日期字段。