数据库系统概论 第三章 建表&插入SQL语句 

 1 --Edit by David @ HeBei University 2018
 2 
 3 USE MrDavid  
 4 GO 
 5 
 6 DROP TABLE IF EXISTS SC
 7 DROP TABLE IF EXISTS Student
 8 DROP TABLE IF EXISTS Course
 9 
10 CREATE TABLE Student          
11  (    
12  Sno CHAR(9) PRIMARY KEY,         /* 列级完整性约束条件,Sno是主码*/                  
13  Sname CHAR(20) UNIQUE,             /* Sname取唯一值*/
14  Ssex CHAR(2),
15  Sage SMALLINT,
16  Sdept CHAR(20)
17  ); 
18 
19 CREATE TABLE  Course
20  (    
21  Cno CHAR(4) PRIMARY KEY,
22  Cname CHAR(40),            
23  Cpno CHAR(4),                                         
24  Ccredit SMALLINT,
25  FOREIGN KEY (Cpno) REFERENCES  Course(Cno) 
26  ); 
27 
28 CREATE TABLE  SC
29  (
30  Sno CHAR(9), 
31  Cno CHAR(4),  
32  Grade SMALLINT,
33  PRIMARY KEY (Sno,Cno),                     /* 主码由两个属性构成，必须作为表级完整性进行定义*/
34  FOREIGN KEY (Sno) REFERENCES Student(Sno),  /* 表级完整性约束条件，Sno是外码，被参照表是Student */
35  FOREIGN KEY (Cno)REFERENCES Course(Cno)     /* 表级完整性约束条件， Cno是外码，被参照表是Course*/
36         ); 
37 
38 
39 INSERT  INTO  Student (Sno,Sname,Ssex,Sdept,Sage) VALUES ('201215121','李勇','男','CS',20);
40 INSERT  INTO  Student (Sno,Sname,Ssex,Sdept,Sage) VALUES ('201215122','刘晨','女','CS',19);
41 INSERT  INTO  Student (Sno,Sname,Ssex,Sdept,Sage) VALUES ('201215123','王敏','女','MA',18);
42 INSERT  INTO  Student (Sno,Sname,Ssex,Sdept,Sage) VALUES ('201215125','张立','男','IS',19);
43 INSERT  INTO  Student (Sno,Sname,Ssex,Sdept,Sage) VALUES ('201215128','陈冬','男','IS',20);
44 
45 SELECT * FROM Student
46 
47 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('1','数据库',NULL,4);
48 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('2','数学',NULL,4);
49 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('3','信息系统',NULL,4);
50 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('4','操作系统',NULL,4);
51 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('5','数据结构',NULL,4);
52 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('6','数据处理',NULL,4);
53 INSERT  INTO Course(Cno,Cname,Cpno,Ccredit)    VALUES ('7','Pascal语言',NULL,4);
54 
55 UPDATE Course SET Cpno = '5' WHERE Cno = '1' 
56 UPDATE Course SET Cpno = '1' WHERE Cno = '3' 
57 UPDATE Course SET Cpno = '6' WHERE Cno = '4' 
58 UPDATE Course SET Cpno = '7' WHERE Cno = '5' 
59 UPDATE Course SET Cpno = '6' WHERE Cno = '7' 
60 
61 SELECT * FROM Course
62 
63 INSERT  INTO SC(Sno,Cno,Grade) VALUES ('201215121 ','1',92);
64 INSERT  INTO SC(Sno,Cno,Grade) VALUES ('201215121 ','2',85);
65 INSERT  INTO SC(Sno,Cno,Grade) VALUES ('201215121 ','3',88);
66 INSERT  INTO SC(Sno,Cno,Grade) VALUES ('201215122 ','2',90);
67 INSERT  INTO SC(Sno,Cno,Grade) VALUES ('201215122 ','3',80);
68 
69 SELECT * FROM SC

 

posted on 2018-03-24 22:38  HBU_DAVID  阅读(985)  评论(0)    收藏  举报

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