Notes
Notes - notes.io |
id INT NOT NULL PRIMARY KEY,
nazwa varchar(60)
);
INSERT INTO przedmiot
VALUES(
1, 'język polski'
);
INSERT INTO przedmiot
VALUES(
2, 'matematyka'
);
INSERT INTO przedmiot
VALUES(
3, 'język angielski'
);
INSERT INTO przedmiot
VALUES(
4, 'biologia'
);
INSERT INTO przedmiot
VALUES(
5, 'chemia'
);
zapytanie 1:
SELECT imie, nazwisko
FROM uczen
WHERE id<11;
zapytanie 2:
SELECT imie, nazwisko, klasa, PESEL
FROM uczen
WHERE nazwisko LIKE 'p%';
zapytanie 3:
SELECT ocena
FROM ocena
WHERE przedmiot_id=1
AND uczen_id=20;
zapytanie 4:
SELECT avg(ocena) as srednia
FROM ocena
WHERE przedmiot_id=1
AND uczen_id=2;
zapytanie 5:
SELECT COUNT(id) as ile_uczniow, klasa
FROM uczen
GROUP BY klasa;
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