Lab Exercise 10-11-12_PLSQL

8/12/2019 Lab Exercise 10-11-12_PLSQL

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LAB EXERCISE 10

PL/SQL (BASICS)


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1. Write a PL/SQL block to find the area of the circle for radius=4. Also the radiusand the new area should be inserted into a table called Circle.

Sol.:

1.circle_area

declare

v_radius number(5,2):=1;

v_area number(8,2):=1;c_pi constant number(3,2):=3.14;

begin

v_radius:= &V_radius;

V_area := c_pi*power(v_radius,2);

insert into circle values(v_radius, V_area);

end;


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2. Write a PL/SQL block to find the area of the circle for different radius untilarea is less than 200. Also the radius and the new area should be insertedinto a table called Different_Area. Solve this question using all the threeloops separately.

Simple Loop

If-then Loop

While Loop


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(a) different_area

declare

v_radius number(5,2):=1;

v_area number(8,2):=1;

c_pi constant number(3,2):=3.14;

begin

v_radius:= 4;Loop

V_area := c_pi*power(v_radius,2);

insert into different_circle values(v_radius, V_area);

v_radius:=v_radius+1;exit when v_radius=10;

end loop;

end;


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(b) diff_area

declare

v_radius number(5,2):=1;v_area number(8,2):=1;


begin

v_radius:= 4;

while (v_radius


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(c) diff_area1

declare

v_radius number(5,2):=1;v_area number(8,2):=1;


begin

v_radius:= 4;

while (v_radius


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LAB EXERCISE 11

PL/SQL(CURSORS)


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1. Write a PL/SQL block to display the emp_name, designation anddept_no from Employee table where dept_no=10.

Solution:

declare

em employee%rowtype;

begin

select * into em from employee where dept_no=10;

dbms_output.put_line('Employee name:'||em.emp_name ||'

Designation:'||em.designation ||' Dept_no:' || em.dept_no);

end;


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2. Write a PL/SQL block to update the value of City in Employee tableusing IMPLICIT CURSOR attributes:

%FOUND

%NOTFOUND

%ROWCOUNT

And EXPLICIT CURSOR attributes:

%NOTFOUND

%ROWCOUNT


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Solution:

/*-----------------Implict cursor---------------*/

declare

row number(4);

begin

update employee set dept_loc='&city' where emp_no=&emp_no;

if sql%found then

dbms_output.put_line('Sussesfully updated');

end if;if sql%notfound then

dbms_output.put_line('Employee not found');

end if;

row:=sql%rowcount;if sql%rowcount>0 then

dbms_output.put_line(row ||' :Employee updated');

end if;

end;


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/*-------------------Explicit cursor--------------------*/

declare

cursor cr_emp is select emp_no from employee where emp_no=&emp_no;

v_emp_no employee.emp_name%type;

row number(5);

begin

open cr_emp;

fetch cr_emp into v_emp_no;

if (cr_emp%notfound) then

dbms_output.put_line('Employee not found');

end if;

row:=cr_emp%rowcount;

if(cr_emp%rowcount>0)then

update employee set dept_loc='&loc' where emp_no=v_emp_no;

dbms_output.put_line(row || ' :row updated');

end if;

close cr_emp;

end;


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declare

cursor c_dep(v_dep_no number)isselect dept_no,dept_loc fromemployee wheredept_no=v_dep_no;

v_dep_no employee.dept_no%type;

v_dep_loc employee.dept_loc%type;

begin

v_dep_no:=&dep_no;

open c_dep(v_dep_no);loop

fetch c_dep intoV_dep_no,v_dep_loc;

if (c_dep%notfound andc_dep%rowcount>0) then

dbms_output.put_line('Lastemployee');

exit;

else

if(c_dep%notfound)then

dbms_output.put_line('noemployee');

end if;

exit when c_dep%notfound;dbms_output.put_line(v_dep_no ||'

'||v_dep_loc);

end if;

end loop;

close c_dep;end;


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4. Write a PL/SQL code block to display the following report in the formatgiven below. Given Table is Emp (Empno, name, deptno, salary,date_of_join):

Years of service No. of persons

=1 and =5 and =10 ----


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declare

cursor c_rep is selectemp_no,date_of_join fromemployee;

doj date;e_no number(5);

n1 number(5):=0;

n2 number(5):=0;

n3 number(5):=0;n4 number(5):=0;

begin

open c_rep;

loop

fetch c_rep into e_no,doj;exit when c_rep%notfound;

if((sysdate-doj)/365=1 and (sysdate-doj)/365=5 and (sysdate-doj)/365=10 )then

n4:=n4+1;

end if;

end loop;

dbms_output.put_line('Years of services Noof person');

dbms_output.put_line('=1 and =5 and =10 ' ||n4);

close c_rep;

end;


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5. Write a PL/SQL code block to display the following reportdepartment wise in the format given below based on thegiven table:

Emp(Empno, name, deptno, salary, date_of_join)

For Department Number: ----

Salary No. of persons

=1000 and =5000 and < 10000 ----

>=10000 ----

Total ----

Given Table

Item_master(icode, description, balstock)

Item_tran(icode, tran_type, qty)


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create table item_master(icodevarchar2(15)primary key check(icodelike 'I%'),

description varchar2(10),

balstock number(5)not null);

create table item_tran(icodevarchar2(15)primary key check(icodelike 'I%'),

tran_type varchar2(6 )not null

check(tran_type in('I','D','U')),qty number(5)not null);

declare

cursor c_item is selecticode,tran_type,qty from item_tran;

icode varchar2(15);

type1 varchar2(5);

qty1 number(5);

begin

open c_item;

loop

fetch c_item into icode,type1,qty1;

exit when c_item%notfound;if(type1='I')then

insert into item_mastervalues(icode,'&description',qty1);

end if;

end loop;

close c_item;end;


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LAB EXERCISE 12

PL/SQL (PROCEDURES)


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1. Write a PL/SQL procedure in which you have toaccept salary from the user. Based on thefollowing range of salary the employee will

receive his/her D.A:

Salary D.A

>1000 and < 3000 5%>3000 and 5000 and < 10000 15%

The D.A which the employees will receive basedon their salary should be notified to themthrough proper messages.


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create or replace procedure da(sal innumber)as

vsal number(5);

beginvsal:=sal;

if(vsal>1000 and vsal3000 and vsal5000 and vsal


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2. Write a PL/SQL procedure to

calculate total salary of the

employees from the Employeetable. Display total salary,Dept_name and Designation if

Emp_no is given.

l d


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create or replace procedurets(empno1 in number)as

sal1 number(5);

dep emp.deptno%type;

des emp.job%type;

begin

select sal into sal1 from emp whereempno=empno1;

if(sal1>1000 and sal13000 and sal15000 and sal1


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Create the Branch_Summary table

with the following specification:

Column Name Data type and Size

Branch_City Varchar2(15)

Reserv_Count Number(3)

Reserv_Amt Number(8)

Cancel_Count

Number(3)

Cancel_Amt Number(8)

Create a procedure which receives branch code as a

parameter and calculates the total collection made due toreservation and lost due to cancellation. It should alsocount the total number of reservations and cancellations.


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create or replace procedureupd_sal(id in varchar2,min_sal innumber,max_sal in number)as

u1 exception;

begin

if(min_sal>max_sal)then

raise u1;

end if;

update jobs setmin_salary=min_sal,max_salary=

max_sal where job_id=id;exception

when no_data_found then

dbms_output.put_line('id notpersent');

when u1 thendbms_output.put_line('minimum

salary is grater then maximumsalary');

end;

declare

id number(4);

min_s jobs.min_salary%type;

max_s number(8);

begin

id:=&jobs_id;

min_s:=&minimum_salary;

max_s:=&maximum_salary;

upd_sal(id,min_s,max_s);

end;

Lab Exercise 10-11-12_PLSQL

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