开始稍微系统点的联系，难度不断增加，持续更新

Posted 2020-09-04 Joker

 1 create database Sprise
 2 use Sprise
 3 go
 4 
 5 create table Student
 6 (
 7 Sno nvarchar(200) primary key not null,
 8 Sname nvarchar(200) not null,
 9 Ssex nvarchar(200) not null,
10 Sbirthday datetime ,
11 Class nvarchar(200) ,
12 
13 )
14 
15 go
16 
17 create table Course
18 (
19 Cno nvarchar(200) primary key not null,
20 Cname nvarchar(200) not null,
21 Tno nvarchar(200) not null,
22 )
23 
24 go
25 
26 create table Score
27 (
28 Sno nvarchar(200) not null,
29 Cno nvarchar(200) not null,
30 Degree decimal(4,1) ,
31 )
32 
33 go
34 
35 create table Teacher
36 (
37 Tno nvarchar(200) primary key not null,
38 Tname nvarchar(200) not null,
39 Tsex nvarchar(200) not null,
40 Tbirthday datetime ,
41 Prof nvarchar(200) ,
42 Depart nvarchar(200) not null,
43 )
44 
45 --select *from Teacher
46 
47 
48 insert into Student values(\'108\',\'曾华\',\'男\',\'1997-09-01\',\'95003\')
49 insert into Student values(\'105\',\'匡华\',\'男\',\'1975-10-12\',\'95031\')
50 insert into Student values(\'107\',\'王丽\',\'女\',\'1976-10-23\',\'95033\')
51 insert into Student values(\'101\',\'李军\',\'男\',\'1974-10-12\',\'95033\')
52 insert into Student values(\'109\',\'王芳\',\'女\',\'1973-10-12\',\'95031\')
53 insert into Student values(\'103\',\'陆君\',\'男\',\'1972-10-12\',\'95031\')
54 
55 go
56 
57 
58 insert into Course values(\'3-105\',\'计算机导论\',\'825\')
59 insert into Course values(\'3-245\',\'操作系统\',\'804\')
60 insert into Course values(\'6-166\',\'数字电路\',\'856\')
61 insert into Course values(\'9-888\',\'高等数学\',\'831\')
62 
63 go
64 
65 insert into Score values(\'103\',\'3-245\',86)
66 insert into Score values(\'105\',\'3-245\',75)
67 insert into Score values(\'101\',\'3-245\',90)
68 insert into Score values(\'105\',\'3-105\',77)
69 insert into Score values(\'103\',\'3-105\',88)
70 insert into Score values(\'107\',\'9-888\',72)
71 insert into Score values(\'107\',\'3-245\',66)
72 insert into Score values(\'109\',\'3-245\',71)
73 insert into Score values(\'103\',\'9-888\',89)
74 insert into Score values(\'108\',\'3-245\',96)
75 
76 go
77 
78 insert into Teacher values(\'804\',\'李成\',\'男\',\'1958-12-20\',\'副教授\',\'计算机系\')
79 insert into Teacher values(\'825\',\'李三\',\'男\',\'1958-11-20\',\'副教授\',\'电子工程系\')
80 insert into Teacher values(\'856\',\'赵四\',\'女\',\'1958-09-20\',\'副教授\',\'计算机系\')
81 insert into Teacher values(\'831\',\'鼠标\',\'男\',\'1958-07-20\',\'副教授\',\'电子工程系\')
82 
83 
84 
85 alter table Score add constraint S_Sc_Sno foreign key (Sno) references Student(Sno)
86 alter table Score add constraint C_Sc_Cno foreign key (Cno) references Course(Cno)
87 alter table Course add constraint T_C_Tno foreign key (Tno) references Teacher(Tno)

重复重复的去熟悉  其实不需要特殊记忆