The document discusses various SQL queries and commands for creating, manipulating, and retrieving data from multiple tables. It includes commands for creating tables, inserting data, updating records, deleting records, and joining tables. It also covers creating views and PL/SQL blocks. Sample queries demonstrate aggregation functions, subqueries, and working with foreign keys across different tables.

1. 3
Queries for Data Definition and Data Manipulation Language
1. Table Student:
Create a table using create command:
Create table Student
(Rollno int, Name char(10), F_name char(10), City char(10), Contact_no num(10), Email_id varchar(15));
Use of Desc command:
Decs students;
Use of Alter command:
alter table students add(course varchar(10));
alter table students modify(roll_no varchar(20));
alter table students drop(permanent_address);

2. 4
Use of insert command:
insert into students values('101','01jul96','mohit tripathi','tara Chandra
tripathi','lalkuan',7351982624,'mohit07tripathi@gmail.com','kaushaliya tripathi' ');
insert into students values('102','21mar97','megha tripathi','tara Chandra
tripathi','lalkuan',9690723702,'mohit01tripathi@gmail.com','kaushaliya tripathi');
insert into students values('103','23sep99','gaurav tripathi','tara Chandra
tripathi','lalkuan',8954290592,'mohittripathi95@gmail.com','kaushaliya tripathi');
Use of select * command:
select *from Student;

3. 5
Use of update command:
update students set address='rampur' where address='haldwani';
Use of delete command:
delete from students where roll_no=108;
2. Table Faculty:
Create table Faculty
(fid varchar(20) primary key,fname varchar(20) not null,fContact_no number(10) not null,
fEmail_id varchar(25) not null,fsalary int check(fsalary>30000),fcourse char(10), fdesignation char(15));
Use of Insert command:
insert into Faculty values('f01','Ajay','12345','abc@gmail.com','32000','MCA','Asstprof');
insert into Faculty values('f02','Juhi','23456','bcd@gmail.com','36000','BCA','Asstprof');
insert into Faculty values('f03','Rajesh','34567','cde@gmail.com','31000','MCA''Asstprof');

4. 6
Use of Select command:
select *from Faculty;
Queries
A. Retrieve the name of faculties earning more than Rs.50000.
select fname from faculty where fsalary >50000;
B. Retrieve the name of faculty who are teaching MCA and are Asstprof.
select fname from faculty where fcourse='MCA' and fdesignation='Asstprof';
C. Retrieve the e-mail and course of juhi and rajesh.
select f_email_id,f_course from faculty
where f_name='juhi' or f_name='rajesh';

5. 7
D. Change the designation of aarti from asstprof to lecturer.
update faculty set f_designation='lacturer'
where f_name='aarti';
E. Change the course cse to cs and e
update faculty set f_course='cs&e'
where f_course='cse';
F. Retrieve the name of employees who have a gmail account.
select fname from Faculty where fEmail_id like '%@gmail.com';
G. Retrieve all the details of faculties whose name start with letter V.
select *from Faculty where fname like 'V%';

6. 8
H. Remove faculty who is earning more than Rs.71000.
delete from Faculty where fsalary >71000
I. Retrieve all the details of the person who is provided a number ‘23456’.
select fname,fEmail_id,fsalary,fcourse,fdesignation from Faculty where fcontact_no='23456';
3. Table Staff:
Create table Staff
(sno varchar(10), fname char(10), lname char(10), salary number(10,2), position char(20));
desc Staff;
insert into Staff values('SL100','John','White','30000.00','Manager');
insert into Staff values('SL101','Susan','Brand','24000.00','Manager');
select *from Staff;

7. 9
Queries based on Aggregate functions for table Staff:
1. select sum(salary) as sum_salary from Staff where position='Manager';
2. select sum(salary) as sum_salary from Staff;
3. select sum(salary) as sum_salary from Staff where position='Project Manager';
4. select avg(Distinct salary) as avg_salary from Staff where Staff.position='Project Manager';
5. select avg(salary) as avg_salary from Staff where Staff.position='Project Manager';
6. select sum(Distinct salary) as sum_salary from Staff;
7. select min(salary)as min_salary from Staff;
8. select max(salary)as max_salary from Staff;
9. select fname from Staff where salary in(select min(salary) from Staff);

8. 10
10. select fname from Staff where salary in(select max(salary) from Staff);
11. select count(sno) as sno_count from Staff where Staff.position='Project Manager';
12. select count(sno) as sno_count from Staff where salary>9000;
13. select count(sno) as sno_count,sum(salary) as sum_salary from Staff where Staff.position='Manager';
Updation on table Staff:
alter table Staff add(bno varchar(10));
update Staff set bno='B3' where fname='John';
update Staff set bno='B5' where fname='Susan';
14. select bno,count(sno) as count,sum(salary) as sum from Staff group by bno;
15. select bno,count(sno) as count,sum(salary) as sum from Staff group by bno order by bno;

9. 11
4. Table Address, People1, PhoneNumbers1:
create table Address
(AddressID int primary key, Company char(10),
Address number(10),Zip number(10));
describe Address;
create table People1
(Id int primary key,Name char(10),
AddressId int references Address(AddressID));
describe People1;
create table PhoneNumbers1
(PhoneID int primary key,Id int references People(Id),Phone number(10));
describe PhoneNumbers1;
insert into Address values('1','ABC','123','12345');
insert into Address values('2','XYZ','456','14454');
insert into Address values('3','PDQ','789','14423');
select *from Address;
select *from People1;
select *from PhoneNumbers1;

10. 12
Queries based on foreign key (or Sub-queries) for above tables:
1. Select name, PhoneID, Company from People1, PhoneNumbers1, Address where
Address.AddressID=People1.AddressID and People1.Id=PhoneNumbers1.Id;
2. select Company,Zip from Address, People1 where name='Jane' and Address.AddressID=People1.AddressID;
3. select Address,Company,Phone from Address,PhoneNumbers1,People1 where name='Chris' and
Address.AddressID=People1.AddressID and People1.Id=PhoneNumbers1.Id;
4. select Company,Zip from Address where AddressId in(select AddressId from People1 where name='Jane');
5. select Address,Company,Phone from Address,PhoneNumbers1 where AddressId in(select AddressId from
People1 where name='Chris');
6. select Phone from Phonenumbers1 where ID in(select ID from People1 where name='Joe');
7. select Name from People1,Address where Company!='ABC' and Address.AddressId=People1.AddressId;

11. 13
8. select Name from People1 where AddressId in(select AddressId from Address where Company!='ABC');
5. Table Branch, Borrow1, Customer, Deposit:
create table Branch(BName char(10) primary key,City char(10));
create table Borrow1
(LoanNo number(10) primary key ,CName char(10), Bname char(10) references Branch(BName),Amount
number(10));
create table Customer(CName char(10) primary key,City char(10));
create table Deposit
(AccountNo number(10) primary key,CName char(10) references Customer(CName),BName char(10),Amount
number(10),ADate date);
insert into Branch values('Vrce','Nagpur');
insert into Branch values('Ajni','Nagpur');
select* from Branch;
select* from Borrow1;

12. 14
select* from Customer;
Select* from Deposit;
Queries related to above tables:
select CName from Deposit where BName in(select BName from Branch where Branch.city='Delhi') and
CName in(select CName from Customer where Customer.City='Mumbai');
select CName from Deposit where BName in (select BName from Branch where CName in(select CName from
Customer where Branch.City=Customer.City));

13. 15
PL/SQL
Programmes of VIEW:
Create view:
1. create view staff_1 as select f_name,position,salary from staff;
2. select * from staff_1;
3. desc staff_1;

14. 16
4. Insert into staff_1 values('mohit','director',100000);
5. select * from staff_1 where position='manager';
6. desc staff;
7. alter view staff_1 add('s_name',varchar);
8. update staff_1 set f_name='ratnesh' where position='director';

15. 17
9. create view staff2 as select position,salary from staff;
10. select * from staff2;
11. delete from staff_1 where f_name='ratnesh';
12. drop view staff2;

16. 18
Write a pl/sql block to print “HELLO” five time.
Write a pl/sql block to print a name:

17. 19
Write a pl/sql block to print a predefine error:
TRIGGERS
Creating a trigger