MySQL的常见操作在这里先做一下总结，已经整合到代码里面，经过检验无误。

复制代码 代码如下:

/*创建一个数据库*/

create database xuning_test;

/*说明当时使用数据库对象*/

use xuning_test;

/*向数据库中添加表并且定义表的结构*/

create table person(

id int not null,

name varchar(16) not null,

sex varchar(16) not null,

age int not null,

address varchar(128) not null,

remark varchar(512) not null

);

/*向数据库的表中插入数据*/

insert into person value

(1,'name_1','men',99,'beijing','This is a frindsheep boy'),

(2,'name_2','men',88,'shanghai','ok great'),

(1,'name_3','man',77,'guangzhou','This is lickly'),

(1,'name_4','men',66,'beijing','This is a frindsheep boy'),

(1,'name_5','men',55,'beijing','you dont going to shool'),

(1,'name_6','man',44,'beijing','This is a frindsheep boy'),

(1,'name_7','men',33,'beijing','This is a frindsheep boy'),

(1,'name_8','man',22,'beijing',''),

(1,'name_9','men',11,'beijing','This is a frindsheep boy')

;

/*查询时否成功插入*/

select * from person;

/*下面是多种查询方式*/

/*根据列的名称属性值*/

select name from person;

/*添加条件-根据性别*/

select name from person where sex = 'men';

/*也可以用比较符作为条件--一定逗号隔开*/

select name,address from person where age > 50;

/*看做对象去使用数据库和表的关系=---双表关联--对象关系一定要明确*/

select xuning_test.person.name, xuning_test.person.id, xuning_test.person.age, xuning_test.person.address

from xuning_test.person, test1.test_xuning

where xuning_test.person.id = test1.test_xuning.id

;

/*使用表的别名进行查询*/

use xuning_test;

select c.name,sex from person as c where c.age > 40 and c.address='beijing';