建立庫：
mysql> create database db_name;php
查詢庫：
mysql> show databases; //顯示全部的數據庫
mysql> show create databases db_name; //顯示特定的數據庫java
刪除庫：
mysql> drop database db_name;mysql
修改庫：
mysql> alter database db_name [modify command];
mysql> alter database db_name character set gbk;sql
建立表：
mysql> use db_name;
mysql> create table tbl_name (column_structure) [tbl_option];數據庫
如：命令行
mysql> create table tbl_name(
variable_name1 varchar(10)
variable_name2 int
);
或：rest
mysql> create table db_name.tbl_name( variable_name1 varchar(10) variable_name2 int );`
查詢表：
查看有哪些表：
mysql> show tables;
或
mysql> show tables like 'pattern_%';
查看錶的建立信息：
mysql> show create table tbl_name;
或
mysql> show create table tbl_name \G
查看錶的結構：
mysql> describe tbl_name;
或
mysql> desc tbl_name;code
刪除表：
mysql> drop table [if exists] tbl_name;rem
修改表：
修改表名：
單個：mysql> rename table old_tbl_name to new_tbl_name;
多個：mysql> rename table old_tbl_name1 to new_tbl_name1, old_tbl_name2 to new_tbl_name2;
跨數據庫：mysql> rename table old_tbl_name to db_name.new_tbl_name;
修改列定義：
增長新列定義：add
alter table tbl_name add new_column_name data_type;
如：
alter table exam_student add height int;
修改列的定義(新的屬性或者數據類型)：modify
mysql> alter table tbl_name modify column_name new_data_type;
刪除一個列：drop
mysql> alter table tbl_name drop column_name;
重命名一個列：change
mysql> alter table tbl_name change old_column_name new_column_name new_data_type;
修改表選項：
mysql> alter table tbl_name new_tbl_option;
mysql> alter table tbl_name character set utf8;it
建立數據：
mysql> insert into tbl_name (fields_list) values (values_list);
如：
mysql> insert into exam_student (stu_name, stu_no) values ('xiaoming', 'php030_01');
若插入全部字段值：
insert into exam_student values ('xiaoming', 'php030_01', 98);
查詢數據：
查看字段信息：
mysql> select * from tbl_name;
參看具體字段列表信息：
mysql> select fields_list from tbl_name where condition;
如：默認狀態下
mysql> select stu_name, stu_no from exam_student;
或：
mysql> select stu_name, stu_no from exam_student where 1;
有條件查詢：
mysql> select * from tbl_name where condition;
如：
mysql> select * from exam_student where fenshu >= 60;
刪除數據：
mysql> delete from tbl_name condition;
如：
mysql> delete from exam_student where fenshu <= 50;
修改數據：
mysql> update tbl_name set field = new_value where condition;
如：
mysql> update exam_student set fenshu =100 where fenshu >= 97;
如：法一：
create table teacher( t_id int primary key [auto_increment], t_name varchar(5), class_name varchar(6), t_days tinyint unsigned );
法二：
mysql> create table teacher( t_id int, t_name varchar(5), class_name varchar(6), t_day tinyint unsigned, primary key (t_id) ); mysql> insert into teacher values (1, '王老師', '0225', 23);
在已建立表中添加主鍵操做：
mysql> alter table tbl_name add primary key (field) ;
mysql> alter table tbl_name modify colunm_name data_type not null primary key auto_increment;
**自動增加：**auto_increment
mysql> alter table tbl_name auto_increment initial_value;
在已建立表中的主鍵id上添加auto_increment
mysql> alter table tbl_name id_name id_name int auto_increment;
如：
主表：
mysql> create table itcast_class( class_id int primary key auto_increment, class_name varchar(10) not null default 'itcast_php' comment '班級名稱' ) character set utf8;
從表：
mysql> create table itcast_student( stu_id int primary key auto_increment, stu_name varchar(10) not null default '', class_id int, foreign key (class_id) references itcast_class (class_id) ) character set utf8;
插入數據的順序：先主表，後從表
mysql> insert into itcast_class values (null, 'php0331');
mysql> insert into itcast_student values (null, '張三', 1);
刪除操做：
mysql> alter table itcast_student drop foreign key itcast_student_ibfk_1;
mysql> alter table itcast_student add foreign key (class_id) references itcast_class (class_id)
on delete set null; //主表裏刪除某個字段，從表若對應外鍵則變成null
或者：
on delete cascade;//主表刪除一個字段，從表對應的外鍵則會刪除相應的值
又或者：
on update restrict;//不容許主表進行更新操做
mysql> delete from itcast_class where class_id = 1;
mysql> select max(field) from tbl_name;
內鏈接：
mysql> select tbl1_name.field, tbl2_name.field1, tbl2_name.field2... from tbl1_name inner join tbl2_name on tbl1_name.id = tbl2_name.id where condition;
外鏈接：
select tbl1_name.fields, tbl2_name.fields from tbl1_name left outer join tbl2_name on tbl1_name.id = tbl2_name.id;
進入mysql中後，在命令行中mysql>
輸入：mysql> set password for [root@localhost](mailto:root@localhost) = password('123456');