
тест по основами SQL
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19 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой оператор используется для выборки данных из таблицы?
SELECT
GET
FETCH
RETRIEVE
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой оператор SQL используется для удаления всех строк из таблицы без удаления структуры?
DELETE
DROP
TRUNCATE
REMOVE
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой оператор используется для создания таблицы в SQL?
CREATE TABLE
NEW TABLE
ADD TABLE
MAKE TABLE
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Какие основные типы данных используются в Oracle SQL? (Выберите 2)
NUMBER
VARCHAR2
STRING
DATETIME
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой SQL-запрос создаст таблицу employees с колонками id (число) и name (строка до 50 символов)?
CREATE employees (id INT, name STRING(50));
MAKE TABLE employees (id NUMBER, name CHAR(50));
CREATE TABLE employees (id NUMBER, name VARCHAR2(50));
TABLE CREATE employees (id INT, name VARCHAR2(50));
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Что произойдет, если выполнить DROP TABLE employees?
Все данные в таблице будут удалены, но структура сохранится
Таблица и все её данные будут удалены без возможности восстановления
Таблица будет очищена, но можно восстановить данные командой UNDO
Таблица будет переименована
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой SQL-оператор используется для фильтрации строк по условиям?
WHERE
FILTER
HAVING
CHECK
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