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DROP TABLE osoba;
/
Create table osoba(
id number(11) primary key,
imie varchar2(15) not null,
nazwisko varchar2(20) not null
);
/
insert into osoba(id,imie,nazwisko) values(1,'Jan','Kowalski');
insert into osoba(id,imie,nazwisko) values(2,'Pawel','Kowalski');
insert into osoba(id,imie,nazwisko) values(3,'Jerzy','Kowalski');
insert into osoba(id,imie,nazwisko) values(4,'Adam','Kowalski');
insert into osoba(id,imie,nazwisko) values(5,'Filip','Kowalski');
/
Create or replace package statystyki is
function LiczbaOsob return number;
function LiczbaUnikatowychImion return number;
function LiczbaUnikatowychNazwisk return number;
end statystyki;
/
create or replace package body statystyki is
function LiczbaOsob return number is
v_ile number(11);
begin
select count(*) into v_ile from osoba;
return v_ile;
end LiczbaOsob;
function LiczbaUnikatowychImion return number is
v_ile number(11);
begin
select count(*) into v_ile from (select distinct imie from osoba) t;
return v_ile;
end LiczbaUnikatowychImion;
function LiczbaUnikatowychNazwisk return number is
v_ile number(11);
begin
select count(*) into v_ile from (select distinct nazwisko from osoba) t;
return v_ile;
end LiczbaUnikatowychNazwisk;
end statystyki;
/
set serveroutput on
/
begin
dbms_output.put_line('Liczba osób:'||statystyki.LiczbaOsob);
dbms_output.put_line('Liczba unikatowych imion:'||
statystyki.LiczbaUnikatowychImion);
dbms_output.put_line('Liczba unikatowych nazwisk:'||
statystyki.LiczbaUnikatowychNazwisk);
end;
     
 
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