MySQL view

step 1： Create student table stu, Insert 3 Bar record .

CREATE TABLE stu

(

s_id INT PRIMARY KEY,

s_name VARCHAR(20),

addr VARCHAR(50),

tel VARCHAR(50)

);

INSERT INTO stu

VALUES(1,‘XiaoWang’,‘Henan’,‘0371-12345678’),

(2,‘XiaoLi’,‘Hebei’,‘13889072345’),

(3,‘XiaoTian’,‘Henan’,‘0371-12345670’);

step 2： Create enrollment form sign, Insert 3 Bar record .

CREATE TABLE sign

(

s_id INT PRIMARY KEY,

s_name VARCHAR(20),

s_sch VARCHAR(50),

s_sign_sch VARCHAR(50)

);

INSERT INTO sign

VALUES(1,‘XiaoWang’,‘Middle School1’,‘Peking University’),

(2,‘XiaoLi’,‘Middle School2’,‘Tsinghua University’),

(3,‘XiaoTian’,‘Middle School3’,‘Tsinghua University’);

step 3： Create a score sheet stu_mark, Insert 3 Bar record .

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);

step 4： Create an exam Peking University View of students
Inquire about ：

step 5： Create an exam Tsinghua University View of students

Inquire about ：

step 6：XiaoTian When you enter your grades, you make mistakes and record too many 50 branch , Correct their entry results .

step 7： View the updated views and tables .

step 8： View the creation information of the view .

step 9： Delete the created view .