MySQL的常見操作在這里先做一下總結(jié)，已經(jīng)整合到代碼里面，經(jīng)過檢驗無誤。

/*創(chuàng)建一個數(shù)據(jù)庫*/

create database xuning_test;

/*說明當(dāng)時使用數(shù)據(jù)庫對象*/

use xuning_test;

/*向數(shù)據(jù)庫中添加表并且定義表的結(jié)構(gòu)*/

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

);

/*向數(shù)據(jù)庫的表中插入數(shù)據(jù)*/

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')

;

/*查詢時否成功插入*/

select * from person;

/*下面是多種查詢方式*/

/*根據(jù)列的名稱屬性值*/

select name from person;

/*添加條件-根據(jù)性別*/

select name from person where sex = 'men';

/*也可以用比較符作為條件--一定逗號隔開*/

select name,address from person where age > 50;

/*看做對象去使用數(shù)據(jù)庫和表的關(guān)系=---雙表關(guān)聯(lián)--對象關(guān)系一定要明確*/

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

;

/*使用表的別名進(jìn)行查詢*/

use xuning_test;

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

總結(jié)

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