SQL - zapytania

SQL - zapytania

3rd Grade

24 Qs

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SQL - zapytania

SQL - zapytania

Assessment

Quiz

Other

3rd Grade

Practice Problem

Medium

Created by

Dawid Gieniusz

Used 2+ times

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24 questions

Show all answers

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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