
SQL - zapytania
Authored by Dawid Gieniusz
Other
3rd Grade
Used 2+ times

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24 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Co to jest SQL?
SQL is a programming language used for creating websites.
SQL is a hardware component in computers.
SQL is a domain-specific language used for managing data in relational database management systems.
SQL is a type of computer virus.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Jakie są podstawowe polecenia SQL?
SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, DROP
MODIFY
ADD
CLEAR
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Jakie są różnice między poleceniem SELECT a poleceniem INSERT w SQL?
SELECT is for adding new records, INSERT is for retrieving data.
SELECT is for updating data, INSERT is for deleting records.
SELECT is for filtering data, INSERT is for sorting records.
SELECT is for retrieving data, INSERT is for adding new records.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Co oznacza klauzula WHERE w zapytaniach SQL?
Grupowanie rekordów według określonego kryterium
Usuwanie rekordów z bazy danych
Filtrowanie rekordów na podstawie warunku
Sortowanie rekordów alfabetycznie
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Jakie są typy złączeń w SQL?
INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN, CROSS JOIN
SELF JOIN
UNION JOIN
OUTER JOIN
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Co to jest klauzula GROUP BY?
Klauzula GROUP BY służy do sortowania wyników zapytania
Klauzula GROUP BY służy do łączenia tabel w bazie danych
Klauzula GROUP BY służy do usuwania duplikatów z wyników zapytania
Klauzula GROUP BY w języku SQL służy do grupowania wyników zapytania na podstawie określonej kolumny lub kolumn.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Jakie są funkcje agregujące w SQL?
SUM(), AVG(), COUNT(), MIN(), MAX()
TOTAL()
RANGE()
AVERAGE()
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