mysql: create database

/***************************************
 *        DDL: Create Database         *
 ***************************************/

-- drop existing database if exists;
DROP DATABASE IF EXISTS fitbit_new;

-- create database;
CREATE DATABASE fitbit_new;

-- use database;
USE fitbit_new;
show tables;

/***************************************
 *           DDL: Create Table         *
 ***************************************/

/*        product          */
-- create table product;
DROP TABLE IF EXISTS product, client, sales;

describe sales;
-- alter table;

/*       client      */
-- create table client;

describe client;

/*        sales         */
-- create table sales;

-- create foreign key seperately;
alter table sales add
constraint fk_client_id_wanmen
	foreign key (client_id)
    references client (client_id)
    on delete cascade;

-- drop foreign key;
alter table sales drop
foreign key fk_client_id_wanmen;

-- add update cascade;
alter table sales drop
foreign key fk_client_id;
alter table sales drop
foreign key fk_product_id;
alter table sales add
constraint fk_product_id
	foreign key (product_id)
    references product (product_id)
    on delete cascade
    on update cascade;
alter table sales add
constraint fk_client_id
	foreign key (client_id)
    references client (client_id)
    on delete cascade
    on update cascade;

-- create view;

/**********************************************
 *        DML: Insert, Update, Delete         *
 **********************************************/

INSERT INTO product
VALUES
(1,‘E-ZIP‘,‘Zip‘,‘EVERYDAY‘,‘GREEN‘,‘Y‘,59.95),
(2,‘E-FLX‘,‘Flex‘,‘EVERYDAY‘,‘BLACK‘,‘N‘,99.95),
(3,‘A-BLZ‘,‘Blaze‘,‘ACTIVE‘,‘PURPLE‘,‘Y‘,199.95),
(4,‘P-SUG‘,‘Surge‘,‘PERFORMANCE‘,‘BLACK‘,‘Y‘,249.95);
select * from product;

-- update product;
update product
set product_id = 200
where product_id = 2;

-- cascade delete
delete from product
where product_id = 200;

INSERT INTO sales
(tran_id, date, product_id, client_id, price, quantity)
VALUES
(1,‘2016-6-1‘, 1, 1, 40, 10),
(2,‘2016-6-5‘, 1, 2, 30, 5),
(3,‘2016-6-8‘, 2, 1, 80, 8),
(4,‘2016-6-8‘, 2, 2, 70, 7),
(5,‘2016-6-13‘, 3, 2, 150, 5),
(6,‘2016-6-18‘, 3, 4, 150, 10),
(7,‘2016-6-20‘, 2, 4, 40, 15);
select * from sales;
-- update sales;
update sales
set date = ‘2016-06-21‘,price = 200
where date = ‘2016-06-20‘ and tran_id = 7;

INSERT INTO client
VALUES
(1,‘FITBIT‘,‘ONLINE‘),
(2,‘AMAZON‘,‘ONLINE‘),
(3,‘BESTBUY‘,‘OFFLINE‘),
(4,‘WALMART‘,‘OFFLINE‘)
;
select * from client;
-- create table SHIPPING;
DROP TABLE IF EXISTS shipping;

create table if not exists shipping(
	shipping_id int not null,
    tran_id int not null,
    tracking_no int,
    status enum(‘preparing‘, ‘shipped‘, ‘arrived‘),
    arrive_date date,
    eta	date,
    primary key (tran_id),
    constraint fk_tran_id
	foreign key (tran_id)
    references sales (tran_id)
    on delete cascade
    on update cascade
);

select * from shipping;

/***************************************  *        DDL: Create Database         *  ***************************************/
-- drop existing database if exists;DROP DATABASE IF EXISTS fitbit_new;
-- create database;CREATE DATABASE fitbit_new;
-- use database;USE fitbit_new;show tables;
/***************************************  *           DDL: Create Table         *  ***************************************/
/*        product          */-- create table product;DROP TABLE IF EXISTS product, client, sales;

describe sales;-- alter table;

/*       client      */-- create table client;

describe client;

/*        sales         */-- create table sales;

-- create foreign key seperately;alter table sales addconstraint fk_client_id_wanmenforeign key (client_id)    references client (client_id)    on delete cascade;
-- drop foreign key;alter table sales dropforeign key fk_client_id_wanmen;
-- add update cascade;alter table sales dropforeign key fk_client_id;alter table sales dropforeign key fk_product_id;alter table sales addconstraint fk_product_idforeign key (product_id)    references product (product_id)    on delete cascade    on update cascade;alter table sales addconstraint fk_client_idforeign key (client_id)    references client (client_id)    on delete cascade    on update cascade;
-- create view;

/**********************************************  *        DML: Insert, Update, Delete         *  **********************************************/
INSERT INTO product VALUES(1,‘E-ZIP‘,‘Zip‘,‘EVERYDAY‘,‘GREEN‘,‘Y‘,59.95),(2,‘E-FLX‘,‘Flex‘,‘EVERYDAY‘,‘BLACK‘,‘N‘,99.95),(3,‘A-BLZ‘,‘Blaze‘,‘ACTIVE‘,‘PURPLE‘,‘Y‘,199.95),(4,‘P-SUG‘,‘Surge‘,‘PERFORMANCE‘,‘BLACK‘,‘Y‘,249.95);select * from product;
-- update product;update productset product_id = 200where product_id = 2;
-- cascade deletedelete from productwhere product_id = 200;

INSERT INTO sales (tran_id, date, product_id, client_id, price, quantity)VALUES(1,‘2016-6-1‘, 1, 1, 40, 10),(2,‘2016-6-5‘, 1, 2, 30, 5),(3,‘2016-6-8‘, 2, 1, 80, 8),(4,‘2016-6-8‘, 2, 2, 70, 7),(5,‘2016-6-13‘, 3, 2, 150, 5),(6,‘2016-6-18‘, 3, 4, 150, 10),(7,‘2016-6-20‘, 2, 4, 40, 15); select * from sales;-- update sales;update salesset date = ‘2016-06-21‘,price = 200where date = ‘2016-06-20‘ and tran_id = 7;

INSERT INTO client VALUES(1,‘FITBIT‘,‘ONLINE‘),(2,‘AMAZON‘,‘ONLINE‘),(3,‘BESTBUY‘,‘OFFLINE‘),(4,‘WALMART‘,‘OFFLINE‘);select * from client;-- create table SHIPPING;DROP TABLE IF EXISTS shipping;
create table if not exists shipping(shipping_id int not null,    tran_id int not null,    tracking_no int,    status enum(‘preparing‘, ‘shipped‘, ‘arrived‘),    arrive_date date,    etadate,    primary key (tran_id),    constraint fk_tran_idforeign key (tran_id)    references sales (tran_id)    on delete cascade    on update cascade);
select * from shipping;

原文地址：https://www.cnblogs.com/tabCtrlShift/p/9234558.html