23) Consider the following entities and their relationship.
University (u_no, u_name, u_city)
College (c_no, c_name, c_city, year_of_establishment )
Relationship between University and College is one-to-many
Constraints: primary key, foreign key,
u_name and c_name should not be null.
Create a RDB in 3NF and write PL/SQL blocks in Oracle for the following:
Write a procedure which will display year wise details of colleges belongs to given University.
Write a trigger that restricts insertion of college having year of establishment greater than current year. (Raise user defined exception and give appropriate message)
Q1)create or replace procedure p7
as
cursor ips is select u_name,c_no, c_name, c_city, year from University u ,College c
where u.u_no=c.u_no
order by year;
begin
for x in ips
loop
dbms_output.put_line(x.u_name||' '||x.c_no||' '||x.c_name||' '||x.c_city||' '||x.year);
end loop;
end;
output:declare
begin
p7;
end;
Q2)
create or replace trigger t12
before insert or update on College
for each row
begin
if(:new.year<:new.year) then
raise_application_error(-2013,'current year should be greater than previous year');
end if;
end;
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