DataBase physical design

//Table: /*student*/ create table student(id int not null primary key, /*學號*/name varchar(20) not null, /*姓名*/college varchar(20) not null, /*學院*/grade int not null, /*年級*/gender varchar(6) not null, /*性別*/age int not null /*年齡*/ );

Table student(學生信息)

idnamecollegegradegenderage

14001	pual	CS	junior	male	20
14002	alice	AD	junjor	femele	21

可按上述表格形式插入

/*study*/ create table curriculum(s_id int not null, /*學號*/c_id int not null /*課程號*/constraint c_id_fk foreign key (c_id) references course(c_id) );

Table curriculum(課表)

s_idc_id

14001	9001
14001	9002
14002	9001
14002	9003
14003	9004

/*study*/ create table course(c_id int not null constraint primary key, /*課程號*/teacher varchar(20) not null, /*老師*/credit int not null, /*學分*/signed int not null, /*簽到率*/c_difficulty int not null /*課程難度*/ );

Table course

c_idc_nameteachersigned(10)c_difficulty(10)

9001	DataBase	Dr.Guan JiHong	10	8
9002	Computer Graphic	Dr.Zhao Junqiao	0	9
9003	Computer Architecture	Dr.Qin Guofeng	9	8
9004	Operate System	Dr.Fang Yu	0	8.5

/*do*/ create table task(t_id varchar(7) not null constraint primary key,/*作業號(任務創立日期+編號)*//* 格式: Year+M + D + numbere.g 7 + 12 + 16 + 02 */t_course int constraint t_c_fk foreign key references course(c_id), /*作業所屬課程*/t_deadline datetime, /*20161210 最后期限*/t_detail varchar(20), /*詳情*/t_amount int not null, /*1.2.3.4.5 作業數量*/t_difficulty int not null /*1.2.3.4.5 作業難度*/ );

Table task

t_idt_courset_deadlinet_detailt_amount(10)t_difficulty(10)

6121601	9001	2016-12-20 23:59:59	P232,2/3/5	3	7
2	9002	2017-01-09 23:59:59	Assignment3	2	9

create table message(m_id int not null constraint primary key,/*信息號(任務創立日期+編號)格式: Year+M + D + numbere.g 7 + 12 + 16 + 02 */type varchar(10) not null, /*信息類型:娛樂(entertainment)興趣(interest)工作(job)學習(study)信仰(faith)*/details varchar(30), /*詳情*/m_deadline datetime, /*最后期限*/duration datetime, /*持續時間*/Emergency_index int not null /*1.2.3.4.5 緊急程度*/ );

Table message

m_idtypedetailsStartEndEmergency_index(10)

6120201	interest	play piano	2016-12-12 17:30:00	2016-12-12-17:59:59	9
6120201	faith	go to the YangPu church	2016-12-12 17:30:00	2016-12-12-17:59:59	9

/*live*/ create table birthday(f_name varchar(20) not null constraint primary key, /*姓名*/relation varchar(10) not null, /*關系*/current_age int not null, /*當前年齡*/f_gender varchar(6) not null, /*性別*/f_birthdat datetime not null, /*生日*/gift varchar(1) not null /*是否需要禮物*/ ); f_namerelationcurrent_agef_genderf_birthdaygift(Y/N)

Bob	Faother	34	male	2017-09-17 00:00:00	Y
Alice	sister	23	female	2017-02-13 00:00:00	Y
Judy	friend	20	female	2017-02-22 00:00:00	Y

以學號建立索引
生日表以姓名建立索引

轉載于:https://www.cnblogs.com/pualus/p/6188319.html

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