
SQL: Funkcje agregujące
Flashcard
•
Computers
•
11th Grade
•
Practice Problem
•
Hard
Agnieszka Rabenda
FREE Resource
Student preview

17 questions
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1.
FLASHCARD QUESTION
Front
Co robi funkcja AVG w SQL?
Back
Oblicza średnią wartości w danej kolumnie.
2.
FLASHCARD QUESTION
Front
Jak wygląda składnia funkcji AVG?
Back
SELECT AVG(kolumna) FROM nazwa_tabeli;
3.
FLASHCARD QUESTION
Front
Jakie zapytanie SQL oblicza średnią ocen w tabeli ocena?
Back
SELECT AVG(ocena) FROM ocena;
4.
FLASHCARD QUESTION
Front
Co zwraca funkcja SUM w SQL?
Back
Oblicza sumę wartości w danej kolumnie.
5.
FLASHCARD QUESTION
Front
Jak wygląda składnia funkcji SUM?
Back
SELECT SUM(kolumna) FROM nazwa_tabeli;
6.
FLASHCARD QUESTION
Front
Jakie zapytanie SQL oblicza sumę ocen w tabeli ocena?
Back
SELECT SUM(ocena) FROM ocena;
7.
FLASHCARD QUESTION
Front
Co robi funkcja MIN w SQL?
Back
Zwraca najmniejszą wartość w danej kolumnie.
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