技術標籤：資料庫MySQLmysql資料庫

步驟1：建立學生表stu，插入3條記錄

#建立stu表
CREATE TABLE stu
(
s_id INT PRIMARY KEY,
s_name VARCHAR(20),
addr VARCHAR(50),
tel VARCHAR(50)
);

#stu表中插入資料
INSERT INTO stu
VALUES(1,'XiaoWang','Henan','0371-12345678'),
(2,'XiaoLi','Hebei','13889072345'),
(3,'XiaoTian','Henan','0371-12345670');

步驟2：建立報名表sign，插入3條記錄

#建立sign表
CREATE TABLE sign
(
s_id INT PRIMARY KEY,
s_name VARCHAR(20),
s_sch VARCHAR(50),
s_sign_sch VARCHAR(50)
);

#表sign中插入資料
INSERT INTO sign
VALUES(1,'XiaoWang','Middle School1','Peking University'),
(2,'XiaoLi','Middle School2','Tsinghua University'),
(3,'XiaoTian','Middle School3','Tsinghua University');
 

步驟3：建立成績表stu_mark，插入3條記錄

CREATE TABLE stu_mark (s_id INT PRIMARY KEY ,s_name VARCHAR(20) ,mark int );
INSERT INTO stu_mark VALUES(1,'XiaoWang',80),(2,'XiaoLi',71),(3,'XiaoTian',70);

步驟4：建立考上Peking University的學生的檢視

create view Peki_stu(學號,姓名,成績,大學) as
select a.s_id,a.s_name,mark,s_sign_sch from sign a  inner join stu_mark b  
on a.s_id=b.s_id 
where s_sign_sch='Peking University';
 

步驟5：建立考上Tsinghua University的學生的檢視

create view Tsing_stu(學號,姓名,成績,大學) as
select a.s_id,a.s_name,mark,s_sign_sch from sign a  inner join stu_mark b  
on a.s_id=b.s_id 
where s_sign_sch='Tsinghua University';

步驟6：XiaoTian的成績在錄入的時候錄入錯誤多錄了50分，對其錄入成績進行

update stu_mark 
set mark=mark-50
where stu_mark.s_name='XiaoTian';

步驟7：檢視更新過後檢視和表的情況

步驟8：檢視檢視的建立資訊

#檢視北大學生資訊
mysql> show create view Peki_stu \G
*************************** 1. row ***************************
                View: Peki_stu
         Create View: CREATE ALGORITHM=UNDEFINED DEFINER=`skip-grants user`@`skip-grants host` SQL SECURITY DEFINER VIEW `Peki_stu` AS select `a`.`s_id` AS `學號`,`a`.`s_name` AS `姓名`,`b`.`mark` AS `成績`,`a`.`s_sign_sch` AS `大學` from (`sign` `a` join `stu_mark` `b` on((`a`.`s_id` = `b`.`s_id`))) where (`a`.`s_sign_sch` = 'Peking University')
character_set_client: utf8
collation_connection: utf8_general_ci
1 row in set (0.00 sec)

#檢視清華學生資訊
mysql> show create view Tsing_stu \G
*************************** 1. row ***************************
                View: Tsing_stu
         Create View: CREATE ALGORITHM=UNDEFINED DEFINER=`skip-grants user`@`skip-grants host` SQL SECURITY DEFINER VIEW `Tsing_stu` AS select `a`.`s_id` AS `學號`,`a`.`s_name` AS `姓名`,`b`.`mark` AS `成績`,`a`.`s_sign_sch` AS `大學` from (`sign` `a` join `stu_mark` `b` on((`a`.`s_id` = `b`.`s_id`))) where (`a`.`s_sign_sch` = 'Tsinghua University')
character_set_client: utf8
collation_connection: utf8_general_ci
1 row in set (0.00 sec)

步驟9：刪除建立的檢視

完成！！！