16 KiB
16 KiB
Writeup
Table Creation
Student Table Creation - RegNo is the primary key as defined by the question.
SQL> create table STUDENT(regno varchar(20),name varchar(50),major varchar(20),bdate date,constraint pkeySTUDENT primary key(regno));
Table created.
Course Table Creation
SQL> create table COURSE(course# int,cname varchar(30),dept varchar(30));
Table created.
Verifying, we get
SQL> desc STUDENT;
Name Null? Type
----------------------------------------- -------- ----------------------------
REGNO NOT NULL VARCHAR2(20)
NAME VARCHAR2(50)
MAJOR VARCHAR2(20)
BDATE DATE
SQL> desc COURSE;
Name Null? Type
----------------------------------------- -------- ----------------------------
COURSE# NUMBER(38)
CNAME VARCHAR2(30)
DEPT VARCHAR2(30)
Adding the textbook table:
SQL> create table text(book_isbn int primary key,booktitle varchar(20),publisher varchar(50),author varchar(50));
Table created.
SQL> desc TEXT;
Name Null? Type
----------------------------------------- -------- ----------------------------
BOOK_ISBN NOT NULL NUMBER(38)
BOOKTITLE VARCHAR2(20)
PUBLISHER VARCHAR2(50)
AUTHOR VARCHAR2(50)
For the ENROLL table, we'll have
SQL> ALTER TABLE COURSE
2 ADD CONSTRAINT pk_course PRIMARY KEY (course#);
Table altered.
SQL> CREATE TABLE ENROLL (
2 regno VARCHAR2(20),
3 course# NUMBER(38),
4 sem INT,
5 book_isbn NUMBER(38),
6 PRIMARY KEY (regno, course#),
7 CONSTRAINT fkey1course FOREIGN KEY (regno) REFERENCES STUDENT (regno),
8 CONSTRAINT fkey2course FOREIGN KEY (course#) REFERENCES COURSE (course#),
9 CONSTRAINT fkey3book FOREIGN KEY (book_isbn) REFERENCES TEXT (book_isbn)
10 );
Table created.
SQL>
SQL> create table BOOK_ADOPTION(course# int,sem int,book_isbn int,primary key(course#,book_isbn),constraint fkey1book_adoption foreign key(course#)references course(course#));
Table created.
SQL> desc ENROLL;
Name Null? Type
----------------------------------------- -------- ----------------------------
REGNO NOT NULL VARCHAR2(20)
COURSE# NOT NULL NUMBER(38)
SEM NUMBER(38)
BOOK_ISBN NUMBER(38)
SQL> desc BOOK_ADOPTION;
Name Null? Type
----------------------------------------- -------- ----------------------------
COURSE# NOT NULL NUMBER(38)
SEM NUMBER(38)
BOOK_ISBN NOT NULL NUMBER(38)
Now, defining the foreign key nature of BOOK_ISBN, we have:
SQL> alter table BOOK_ADOPTION add constraint fkey2book_adoption foreign key(book_isbn) references text(book_isbn);
Table altered.
SQL> alter table enroll add constraint fkey3enroll foreign key(book_isbn) references text(book_isbn);
Table altered.
Verifying status so far, we have
SQL> desc ENROLL;
Name Null? Type
----------------------------------------- -------- ----------------------------
REGNO NOT NULL VARCHAR2(20)
COURSE# NOT NULL NUMBER(38)
SEM NUMBER(38)
BOOK_ISBN NUMBER(38)
SQL> desc BOOK_ADOPTION;
Name Null? Type
----------------------------------------- -------- ----------------------------
COURSE# NOT NULL NUMBER(38)
SEM NUMBER(38)
BOOK_ISBN NOT NULL NUMBER(38)
SQL> descc TEXT;
SP2-0042: unknown command "descc TEXT" - rest of line ignored.
SQL> desc TEXT;
Name Null? Type
----------------------------------------- -------- ----------------------------
BOOK_ISBN NOT NULL NUMBER(38)
BOOKTITLE VARCHAR2(20)
PUBLISHER VARCHAR2(50)
AUTHOR VARCHAR2(50)
POPULATING TUPPLES
Insertion into student:
SQL> insert into student values('123','Ashwin','CCE','17-oct-2003');
1 row created.
SQL> insert into student values('456','Aadit','CCE','03-feb-2005');
1 row created.
SQL> insert into student values('789','Shrikanth','Environment','01-jan-2023');
1 row created.
SQL> insert into student values('101','Aarav','Environment','23-sep-2004');
1 row created.
SQL> insert into student values('567','Amogh','CSE','03-mar-2004');
1 row created.
SQL> insert into student values('890','Saarthak','CSE','03-jul-2004');
1 row created.
Insertion into COURSE:
SQL> insert into COURSE values(1101,'DBMS','ICT');
1 row created.
SQL> insert into COURSE values(1102,'DAA','ICT');
1 row created.
SQL> insert into COURSE values(2201,'COA','CS');
1 row created.
SQL> insert into COURSE values(2202,'DSD','CS');
1 row created.
SQL> insert into COURSE values(3301,'MATH','EVS');
1 row created.
SQL> insert into COURSE values(3302,'POETRY','EVS');
1 row created.
SQL> insert into COURSE values(3303,'Random','EVS');
1 row created.
Insertion in TEXT:
SQL> insert into TEXT values(1234,'DBMS vol 1','Pearson','SS');
1 row created.
SQL> insert into TEXT values(4123,'DBMS vol 2','Pearson','SS');
1 row created.
SQL> insert into TEXT values(5678,'DAA vol 2','Pearson','Ramanujan');
1 row created.
SQL> insert into TEXT values(9012,'COA vol 666','Cengage','Satan');
1 row created.
SQL> insert into TEXT values(3456,'DSD vol 99','Penguin','Panda');
1 row created.
SQL> insert into TEXT values(7890,'Math vol 66','U-Like','R S Aggrwal');
1 row created.
SQL> insert into TEXT values(1123,'Poetry vol 0','OML','Yahya Bootwaala');
1 row created.
Insertion into ENROLL:
SQL> insert into enroll values('123',1101,1,1234);
1 row created.
SQL> insert into enroll values('123',1102,2,5678);
1 row created.
SQL> insert into enroll values('456',1101,3,4123);
1 row created.
SQL> insert into enroll values('456',2201,4,9012);
1 row created.
SQL> insert into enroll values('789',3301,5,7890);
1 row created.
SQL> insert into enroll values('789',3302,6,1123);
1 row created.
SQL> insert into enroll values('101',3302,7,7890);
1 row created.
SQL> insert into enroll values('567',2201,8,9012);
1 row created.
SQL> insert into enroll values('890',2202,1,3456);
1 row created.
Insertion into BOOK_ADOPTION:
SQL> insert into BOOK_ADOPTION values(1101,1,1234);
1 row created.
SQL> insert into BOOK_ADOPTION values(1102,2,4123);
1 row created.
SQL> insert into BOOK_ADOPTION values(1102,2,5678);
1 row created.
SQL> insert into BOOK_ADOPTION values(2201,3,9012);
1 row created.
SQL> insert into BOOK_ADOPTION values(2202,4,3456);
1 row created.
SQL> insert into BOOK_ADOPTION values(3301,5,7890);
1 row created.
SQL> insert into BOOK_ADOPTION values(3302,6,1123);
1 row created.
We also create a book that has not been
SQL> insert into text values(8901,'Random vol 66','Classmate','R D Sharma');
1 row created.
SQL> insert into BOOK_ADOPTION values(3303,7,8901);
1 row created.
Resizing the tables to look good in preview...
SQL> alter table student modify name varchar(20);
Table altered.
SQL> alter table student modify regno varchar(10);
Table altered.
SQL> alter table text modify (booktitle varchar(20),publisher varchar(20),author varchar(20));
Table altered.
ENTRY VALIDATION
SQL> select * from STUDENT;
REGNO NAME MAJOR BDATE
---------- -------------------- -------------------- ---------
123 Ashwin CCE 17-OCT-03
456 Aadit CCE 03-FEB-05
789 Shrikanth Environment 01-JAN-23
101 Aarav Environment 23-SEP-04
567 Amogh CSE 03-MAR-04
890 Saarthak CSE 03-JUL-04
6 rows selected.
SQL> select * from COURSE;
COURSE# CNAME DEPT
---------- ------------------------------ ------------------------------
1101 DBMS ICT
1102 DAA ICT
2201 COA CS
2202 DSD CS
3301 MATH EVS
3302 POETRY EVS
3303 Random EVS
7 rows selected.
SQL> select * from TEXT;
BOOK_ISBN BOOKTITLE PUBLISHER AUTHOR
---------- -------------------- -------------------- --------------------
1234 DBMS vol 1 Pearson SS
4123 DBMS vol 2 Pearson SS
5678 DAA vol 2 Pearson Ramanujan
9012 COA vol 666 Cengage Satan
3456 DSD vol 99 Penguin Panda
7890 Math vol 66 U-Like R S Aggrwal
1123 Poetry vol 0 OML Yahya Bootwaala
8901 Random vol 66 Classmate R D Sharma
8 rows selected.
SQL> select * from BOOK_ADOPTION;
COURSE# SEM BOOK_ISBN
---------- ---------- ----------
1101 1 1234
1102 2 4123
1102 2 5678
2201 3 9012
2202 4 3456
3301 5 7890
3302 6 1123
3303 7 8901
8 rows selected.
SQL> select * from ENROLL;
REGNO COURSE# SEM BOOK_ISBN
-------------------- ---------- ---------- ----------
123 1101 1 1234
123 1102 2 5678
456 1101 3 4123
456 2201 4 9012
789 3301 5 7890
789 3302 6 1123
101 3302 7 7890
567 2201 8 9012
890 2202 1 3456
9 rows selected.
Listing courses with more than 1 TEXT BOX
SQL> select CNAME,count(COURSE#) as NUM_TB
2 from COURSE natural join BOOK_ADOPTION
3 group by CNAME
4 having count(COURSE#) > 1;
CNAME NUM_TB
------------------------------ ----------
DAA 2
List the departments whose all course text books are published by a particular publisher.
SQL> select distinct dept
2 from course
3 where not exists(
4 select *
5 from text natural join book_adoption
6 where book_adoption.course# = course.course#
7 and publisher!='Pearson');
DEPT
------------------------------
ICT
Find the students who have enrolled for course of more than one department
SQL> select name
2 from student
3 where regno in(
4 select regno
5 from enroll natural join course
6 group by regno
7 having count(distinct dept)>1);
NAME
--------------------
Aadit
To create a list, we use
SQL> select regno,count(distinct dept)
2 from enroll natural join course
3 group by regno;
REGNO COUNT(DISTINCTDEPT)
-------------------- -------------------
456 2
101 1
890 1
567 1
123 1
789 1
6 rows selected.
Produce a list of students who are not enrolled.
SQL> select regno,name
2 from student
3 where regno not in(
4 select regno from enroll);
REGNO NAME
---------- --------------------
234 Vansh
SQL>
SQL> select regno,name
2 from student
3 where not exists(
4 select regno from enroll
5 where student.regno=enroll.regno);
REGNO NAME
---------- --------------------
234 Vansh
List the department which adopts all the books from the particular publisher
SQL> select distinct dept
2 from course natural join Book_Adoption
3 where book_isbn not in
4 (select book_isbn
5 from course natural join book_adoption join text using(book_isbn)
6 where publisher !='Pearson'
7 );
DEPT
------------------------------
ICT
SQL> select distinct dept
2 from course
3 where not exists
4 (
5 select *
6 from book_adoption natural join text
7 where publisher !='Cengage'
8 and course.course# =book_adoption.course#
9 );
DEPT
------------------------------
EVS
CS
List the books which are adopted by the course as well as enrolled by the student
SQL> select booktitle
2 from text
3 where book_isbn in
4 (
5 select distinct book_isbn
6 from book_adoption join enroll using(book_isbn)
7 );
BOOKTITLE
--------------------
DBMS vol 1
DBMS vol 2
DAA vol 2
COA vol 666
DSD vol 99
Math vol 66
Poetry vol 0
7 rows selected.
List the courses which has adapted at least two books from a specific publisher
SQL> select course#,cname
2 from text natural join book_adoption join course using(course#)
3 where publisher='Pearson'
4 group by (course#,cname)
5 having count(book_isbn)>=2;
COURSE# CNAME
---------- ------------------------------
1102 DAA
Identify the students who are enrolled for maximum number of books.
SQL> select regno,name,count(book_isbn)
2 from enroll natural join student
3 group by regno,name having count(book_isbn)>= all
4 (select count(book_isbn)
5 from enroll natural join student
6 group by regno);
REGNO NAME COUNT(BOOK_ISBN)
---------- -------------------- ----------------
456 Aadit 2
123 Ashwin 2
789 Shrikanth 2
List the publishers along with the number of books published by them.
SQL> select publisher,count(book_isbn)
2 from (select * from text)
3 group by publisher;
PUBLISHER COUNT(BOOK_ISBN)
-------------------- ----------------
Penguin 1
Cengage 2
OML 1
Pearson 3
Classmate 1
SQL>
SQL> select publisher,count(book_isbn)
2 from text
3 group by publisher;
PUBLISHER COUNT(BOOK_ISBN)
-------------------- ----------------
Penguin 1
Cengage 2
OML 1
Pearson 3
Classmate 1
List the students who enrolled for all the books adopted by their course
SQL> select distinct regno
2 from enroll natural join student
3 where exists
4 (select book_isbn
5 from book_adoption
6 where book_adoption.course#=enroll.course#);
REGNO
--------------------
456
101
890
123
567
789
6 rows selected.