CIS 632_Pre-Requisite Quiz Introductory Project Dr. H. Assadipour

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1 CIS 632_Pre-Requisite Quiz Introductory Project Dr. H. Assadipour 1. Table creation: CREATE TABLE Student_01 (sid number, sname varchar(20), address varchar(30), primary key (sid)); //Execute DESC Student_01; //Execute SID NOT NULL NUMBER SNAME VARCHAR2(20) ADDRESS VARCHAR2(30) CREATE TABLE Course_01 (cid cname varchar(20), credits number, primary key (cid)); varchar(7), DESC Completes_01; CID NOT NULL VARCHAR2(7) CNAME CREDITS CREATE TABLE Completes_01 (sid number, cid varchar(7), grade char, primary key (sid, cid), foreign key (sid) references student_01, foreign key (cid) references course_01); //Execute DESC Completes_01; VARCHAR2(20) NUMBER SID NOT NULL NUMBER CID NOT NULL VARCHAR2(7) GRADE CHAR(1) 1

2 CREATE TABLE Section_01 (sec_id cid varchar(7), sec_time varchar(10), location varchar(10), sem_date date, tid Number); number, DESC Section_01; SEC_ID NUMBER CID VARCHAR2(7) SEC_TIME VARCHAR2(10) LOCATION VARCHAR2(10) SEM_DATE DATE TID NUMBER Note: Default format for date is: DD-MM-YY and that for time is HH:MM:SS A.M. To see the current date: SELECT sysdate from dual; 24-JAN-07 SYSDATE 08:01:03 TO_CHAR(SYSDATE,'HH12:MM Let s make the following two changes to the section table. ALTER TABLE section_01 drop (sem_date); Table altered. ALTER TABLE section_01 add (primary key (sec_id, cid)); Table altered. DESC Section_01; SEC_ID NOT NULL NUMBER CID NOT NULL VARCHAR2(7) SEC_TIME LOCATION TID VARCHAR2(10) VARCHAR2(10) NUMBER 2

3 CREATE TABLE Takes_01 (sid number, sec_id number, cid varchar(7), sec_date date, primary key (sid, sec_id, cid), foreign key (sid) references student, foreign key (sec_id, cid) references section); DESC Takes_01; SID NOT NULL NUMBER SEC_ID NOT NULL NUMBER CID NOT NULL VARCHAR2(7) SEC_DATE CREATE TABLE Teacher_01 (tid number, tname varchar(20), dept varchar(5), office number, primary key (tid)); DATE TID NOT NULL NUMBER TNAME DEPT OFFICE VARCHAR2(20) VARCHAR2(5) NUMBER Need to modify Section_01 table to include tid as foreign key referencing the Teacher_01 table. ALTER TABLE Section_01 add (foreign key (tid) references Teacher_01); Table altered. 2. Sample Data Insertion: INSERT INTO Student_01 values ( , 'John Doe','123 Main St.'); INSERT INTO course_01 VALUES ('MTH 121','Calc I', 4); INSERT INTO Course_01 VALUES ('CIS 101','Prog I', 3); INSERT INTO Course_01 VALUES ('','Comp I', 3); 3

4 INSERT INTO Course_01 VALUES ('','US HISTORY', 3); SELECT * FROM Course_01; CID CNAME CREDITS MTH 121 Calc I 4 CIS 101 Prog I 3 Comp I 3 US HISTORY 3 INSERT INTO Completes_01 VALUES ( ,'MTH 121',''); SELECT * FROM Completes_01; SID CID GRA MTH 121 INSERT INTO Teacher_01 VALUES (123,'Assadipour','ME', 332); INSERT INTO Teacher_01 VALUES (456,'Taylor','MATH', 222); INSERT INTO Teacher_01 VALUES (789,'Maddox','CIS', 4401); INSERT INTO Teacher_01 VALUES (987,'Kim','CIS', 4404); INSERT INTO Teacher_01 VALUES (654,'Master','ENG', 301); INSERT INTO Teacher_01 VALUES (321,'Ancient','HIS', 432); SELECT * FROM Teacher_01; TID TNAME DEPT OFFICE 123 Assadipour ME Taylor MATH Maddox CIS Kim CIS Master ENG Ancient HIS rows selected. 4

5 INSERT INTO Section_01 VALUES ('001','','08:30 A.M.','UNIV 215','321'); INSERT INTO Section_01 VALUES ('001','','10:00 A.M.','UNIV 105','654'); INSERT INTO Section_01 VALUES ('101','CIS 101','06:00 P.M.','KUPF 207','987'); INSERT INTO Section_01 VALUES ('002','CIS 101','11:30 A.M.','GITC 2302','789'); INSERT INTO Section_01 VALUES ('001','CIS 101','08:30 A.M.','GITC 1400','987'); INSERT INTO Section_01 VALUES ('101','MTH 121','06:00 P.M.','CUL 105','456'); INSERT INTO Section_01 VALUES ('001','MTH 121','10:00 A.M.','KUPF 205','123'); SELECT * FROM Section_01; SEC_ID CID SEC_TIME LOCATION TID 7 rows selected. 1 08:30 A.M. UNIV :00 A.M. UNIV CIS :00 P.M. KUPF CIS :30 A.M. GITC CIS :30 A.M. GITC MTH :00 P.M. CUL MTH :00 A.M. KUPF INSERT INTO Student_01 VALUES ( ,'Jebb Yousef','100 Vision Rd.'); INSERT INTO Student_01 VALUES ( ,'Ajay Kumar','303 Peeler Ave.'); INSERT INTO Student_01 VALUES ( ,'Kim Smith','900 Groove Rd.'); SELECT * FROM Student_01; SID SNAME ADDRESS John Doe 123 Main St Jebb Yousef 100 Vision Rd Ajay Kumar 303 Peeler Ave Kim Smith 900 Groove Rd 5

6 INSERT INTO Takes_01 VALUES ( ,'101','MTH 121','22-JAN-02'); SID SEC_ID CID SEC_DATE MTH JAN CIS JAN JAN JAN MTH JAN CIS JAN MTH JAN CIS JAN JAN CIS JAN JAN MTH JAN rows selected. 6

7 Query #1: List all the courses John Doe is taking this semester. SQL> select sname, cid 2 from student, section 3 where sid = ' '; SNAME CID John Doe MTH 121 John Doe MTH 121 John Doe John Doe 7 rows selected. Use distinct to eliminate duplicates: SQL> select distinct sname, cid 2 from student, section 3 where sid = ' '; SNAME CID John Doe John Doe John Doe MTH 121 SQL> break on sname; SQL> select distinct sname, cid 2 from student, section 3 where sid = ' '; SNAME CID MTH 121 If you do the same for every student, and not only John Doe, you fin out that the query is wrong! SQL> select distinct sname, cid 2 from student, section; SNAME CID Ajay Kumar CIS 101 MTH 121 Jebb Yousef CIS 101 7

8 MTH 121 MTH 121 Kim Smith CIS 101 MTH rows selected. This is because the takes relationship must be used obtain the correct result, as follows: SQL> select sname, cid 2 from student, takes 3 where student.sid=takes.sid; SNAME CID John Doe MTH 121 CIS 101 Jebb Yousef MTH 121 CIS 101 Kim Smith MTH 121 CIS 101 Ajay Kumar CIS 101 MTH rows selected. Query #2: List all the student names who are taking MTH 121 this semester. SQL> select distinct sname 2 from student, section 3 where cid = 'MTH 121'; SNAME Ajay Kumar Jebb Yousef John Doe Kim Smith Query #3: List teacher name, section id, course id, section time, and location of courses teacher 123 teaches. SQL> l 1 select tname, sec_id, cid, sec_time,location 2 from teacher, section 3 where teacher.tid ='123' 4 and teacher.tid = section.tid 8

9 TNAME SEC_ID CID SEC_TIME LOCATION Assadipour 1 MTH :00 A.M. KUP 205 Query #4: List all sections of MTH 121. SQL> l 1 select distinct course.cid, cname, sec_id 2 from course, section 3 where course.cid = section.cid 4* and course.cid = 'MTH 121' CID CNAME SEC_ID MTH 121 Calc I 1 MTH 121 Calc I 101 Note: Use the following integer to character conversion function to get the leading zeros in sec_id to show up. So the first line in Query #4 becomes: select distinct course.cid, cname, to_char(sec_id,'099') "sec". SQL> select to_char(sec_id,'099') "sec" from section; Query #5: List all the courses the students are taking along with the teachers name. SQL> l 1 select distinct sname, t.cid, tid 2 from student s, takes t, section sec 3* where s.sid=t.sid and t.cid=sec.cid SNAME CID TID Ajay Kumar CIS CIS Jebb Yousef CIS CIS CIS Kim Smith CIS CIS John Doe 654 Kim Smith 654 Ajay Kumar 321 John Doe 321 Ajay Kumar MTH MTH Jebb Yousef MTH MTH John Doe MTH MTH Kim Smith MTH MTH rows selected. 9

10 Query #6: Who are the instructors who are teaching US HISTORY?. SQL> select tname 2 from teacher t, section s, course c 3 where t.tid = s.tid and 4 s.cid = c.cid and 5 cname = 'US HISTORY'; TNAME Ancient Query #7: List the names of the students who are taking MTH 121 with Prof. Assadipour? First, let s find out those teachers who are teaching a specific course, e.g, MTH 121 as cid: SQL> select tname 2 from teacher t, section s, course c 3 where t.tid=s.tid and 4 s.cid=c.cid and 5* c.cid='mth 121' TNAME Assadipour Taylor SQL> l 1 select distinct sname 2 from teacher t, section s, course c, student st, takes ta 3 where t.tid=s.tid and s.cid=c.cid and st.sid=ta.sid and 4 ta.cid=s.cid and ta.sec_id=s.sec_id 5* and c.cid='mth 121' and tname='assadipour' SNAME John Doe Kim Smith A la prochaine fois! 10

Chapter 3: Introduction to SQL. Chapter 3: Introduction to SQL

Chapter 3: Introduction to SQL Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Chapter 3: Introduction to SQL Overview of The SQL Query Language Data Definition Basic Query