feat(DB): lab 1 2

DB/exp1.sql

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+create database eshop4490;
+
+create table members(
+       m_account varchar(20) primary key,
+       m_name varchar(20),
+       m_sex varchar(2),
+       m_address varchar(50),
+       m_salary money,
+       m_password varchar(20)
+       );
+create table products(
+       p_no char(10) primary key,
+       p_name varchar(30),
+       p_quantity int,
+       p_price money,
+       p_information varchar(50)
+       );
+create table orders(
+       m_account varchar(20) references members(m_account),
+       p_no char(10) references products(p_no),
+       o_quantity int,
+       o_date date
+       );
+
+insert into members values ('jin', '刘津', '女', '北京', 8200, 'jin'),
+       	    	    	   ('lfz', '刘法制', '男', '天津', 4500, 'lfz'),
+       	    	    	   ('jinjin', '津津', '女', '北京', 8200, 'jin'),
+       	    	    	   ('liuzc', '刘志成', '男', '湖南株洲', 3500,'liuzc'),
+			   ('Wangym', '王咏梅', '女', '湖南长沙', 4000, 'wangym');
+insert into products values ('101', '香皂', 22, 6, '清洁用品'),
+       	    	     	    ('102', '牙刷', 10, 20, '价廉物美'),
+			    ('103', 'MP3', 100, 450, '电子产品'),
+			    ('104', '毛巾', 10,15, '价廉物美');
+insert into orders values ('lfz', '101', 5, '2017-8-9'),
+       	    	   	  ('Wangym', '101',9, '2017-6-6'),
+			  ('jinjin', '102', 6, '2017-6-6'),
+			  ('liuzc', '102', 4, '2017-8-9'),
+			  ('Wangym', '103', 7, '2017-8-9'),
+			  ('jinjin', '103', 6, '2017-8-9');
+
+update members set m_salary = m_salary * 1.2 WHERE m_sex = '女' and m_address ='北京';

DB/exp2.sql

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+select * from members where m_address like '%湖南%';
+
+
+select p_no, SUM(o_quantity) as total_quantity
+from orders group by p_no
+having SUM(o_quantity) > 5
+order by total_quantity desc;
+
+select m_account,p_no from orders where p_no in (select p_no from orders where m_account = 'Wangym') and m_account != 'Wangym';
+
+create view View1 as
+select * from members 
+where m_account in (select m_account from orders where p_no = '102');
+
+insert into View1 values ('fengx','冯向','男','北京',5000,'fx');
+
+
+select m.*, o.o_quantity, o.o_date, o.p_no
+from members m 
+left join orders o on m.m_account = o.m_account;
+
+update members
+set m_password = 'liu'
+where m_account = 'liuzc';
+
+insert into members values ('liuzc','翁红','男','湖南株洲','5500','123');
+
+alter table members add constraint m_sex_check check (m_sex in('男','女'));
+insert into members values ('liuzh','刘忠怀','工','湖南株洲',3000,'liuzh');
+
+insert into orders values ('Zhou','101',1, '2017-8-9');