Quote (anyd @ 12 Nov 2013 12:44)
7. feladat from the dark
SELECT cim, leltariszam, nev FROM konyvek NATURAL JOIN konyvtari NATURAL JOIN allomany NATURAL JOIN kolcsonoz NATURAL JOIN olvasok;
10. feladat swag from above
alter session set nls_date_format = 'YYY-Mon-DD' ;
SELECT varos, utca FROM olvasok NATURAL JOIN kolcsonoz WHERE lejarat < '2007-MAY-01' ;
1. yolo street
SELECT kiado, count(cim) FROM Konyvek GROUP BY kiado;
2. bang bang csiri biri
SELECT avg(count(cim)) FROM Konyvek GROUP BY kiado;
X.special legtermékenyebb kiado
SELECT max(count(cim)) FROM Konyvek GROUP BY kiado;
3.
SELECT count(cim) FROM Konyvek WHERE szerzo='Shakespeare' GROUP BY kiado;
4.
SELECT count(count(kiado)) FROM Konyvek WHERE szerzo ='Shakespeare' GROUP BY kiado;
SELECT count(DISTINCT kiado) FROM konyvek WHERE szerzo='Shakespeare' ;
11. THE RETURN OF THE PRINCE
SELECT cim FROM Konyvek NATURAL JOIN Konyvtari NATURAL JOIN Allomany GROUP BY cim HAVING count(cim)>1;
SELECT isbn FROM Konyvek NATURAL JOIN Konyvtari NATURAL JOIN Allomany GROUP BY isbn HAVING count(cim)>1;
12.
SELECT cim FROM Konyvek NATURAL JOIN Konyvtari NATURAL JOIN Allomany GROUP BY cim HAVING count(cim)=2;
ugyan ilyeneket csinálunk éppen
kurvára unom
de már csak negyed óra van hátra \o/
This post was edited by fahrii on Nov 12 2013 06:36am