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SELECT harcerze.Druzyny as Druzyna, COUNT(harcerze.Id_harcerza) as ile_osob
FROM harcerze
GROUP BY Druzyna;
WYNIK:
Bukowina 26
Grot 12
Jaworzyna 49
Plomien 16
Watra 14
Wierchy 42
Zawisza 11
Zywioly 17
4.2
(SELECT Nazwa_sprawnosci, SUM(l_punktow) AS liczba_punktow
FROM sprawnosc
INNER JOIN dzialania USING(Id_sprawnosci)
GROUP BY Nazwa_sprawnosci
ORDER BY liczba_punktow DESC
LIMIT 1)
UNION
(SELECT Nazwa_sprawnosci, SUM(l_punktow) AS liczba_punktow
FROM sprawnosc
INNER JOIN dzialania USING(Id_sprawnosci)
GROUP BY Nazwa_sprawnosci
ORDER BY liczba_punktow ASC
LIMIT 1);
WYNIK:
tropiciel 45035
ratownik 4263
4.3
SELECT Imie, Nazwisko, COUNT(DISTINCT Id_sprawnosci) AS Liczba_sprawnosci
FROM harcerze LEFT JOIN dzialania USING(Id_harcerza) GROUP BY Id_harcerza ORDER BY Liczba_sprawnosci DESC;
WYNIK:
Marian Majchrowicz 5
Mateusz Buczek 5
Dariusz Salezy 4
Maciej Linus 4
Zofia Barszczewska 4
Kamil Banasiewicz 4
Ewelina Miejska 4
Janina Koszewska 4
Kamila Przybyla 4
Janusz Lichwiarz 4
Leon Piotrowski 4
Zuzanna Sliwinska 4
Helena Kowalska 4
Marta Kumor 4
Anna Miekus 4
Iza Pankiewicz 4
Jolanta Filipowicz 4
Karina Figura 4
Robert Banaszczyk 4
Patrycja Barcisz 4
Krzysztof Bartodziej 4
Aneta Wolej 3
Teresa Damska 3
Grzegorz Aniol 3
Barbara Solska 3
4.4
SELECT DISTINCT d1.druzyny
FROM harcerze d1
LEFT JOIN(
SELECT druzyny, COUNT(Id_sprawnosci) as na_ratownika
FROM harcerze
INNER JOIN dzialania
USING(Id_harcerza)
WHERE Id_sprawnosci='s6'
GROUP BY druzyny) d2
ON d1.Druzyny=d2.Druzyny
WHERE na_ratownika IS NULL;
WYNIK:
Zywioly
4.5
SELECT harcerze.Imie as imie, harcerze.Nazwisko as nazwisko, sprawnosc.Nazwa_sprawnosci as nazwa_sprawnosci, (dzialania.Koniec_dzial)-(dzialania.Poczatek_dzial)+1 as ilosc_dni
FROM sprawnosc, harcerze, dzialania
WHERE sprawnosc.Id_sprawnosci=dzialania.Id_sprawnosci
AND dzialania.Id_harcerza=harcerze.Id_harcerza
ORDER BY ilosc_dni DESC;
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