

19 разбор
Presentation
•
Instructional Technology
•
12th Grade
•
Practice Problem
•
Medium
Sherkhan Umurzak
Used 7+ times
FREE Resource
0 Slides • 8 Questions
1
Fill in the Blanks
Что выведет данный запрос:
SELECT MIN(Возраст)
From students_score
2
Fill in the Blanks
Что выведет данный запрос:
Type answer...
3
Multiple Select
В таблицу students нужно добавить новый столбец email, который будет содержать электронную почту учеников. Какое SQL выражение необходимо использовать?
A) ALTER TABLE students ADD COLUMN ROW email VARCHAR(50);
B) ALTER TABLE students MODIFY COLUMN email VARCHAR(50);
C) ALTER TABLE students ADD email VARCHAR(50)
D) ALTER TABLE students CHANGE COLUMN email VARCHAR(50);
4
Multiple Choice
Удалите столбец favorite_subject из таблицы students. Какое SQL выражение нужно использовать?
A) ALTER TABLE students DELETE favorite_subject;
B) ALTER TABLE students REMOVE COLUMN favorite_subject;
C) ALTER TABLE students DROP COLUMN favorite_subject;
D) ALTER students DROP ROW favorite_subject;
5
Multiple Choice
Очистите таблицу students, удалив все записи, но оставив структуру таблицы. Какое SQL выражение необходимо использовать?
A) DELETE FROM students;
B) DROP TABLE students;
C) TRUNCATE TABLE students;
D) CLEAR TABLE students;
6
Multiple Choice
Есть таблица Students что вернет данный запрос:
A) age | SUM(id)
-------------
16 | 27
17 | 22
B) age | SUM(id)
-------------
16 | 37
17 | 22
C) age | SUM(id)
-------------
16 | 37
17 | 22
18 | 10
19 | 15
D) age | SUM(id)
-------------
16 | 17
17 | 19
7
Open Ended
Какой запрос выведет количество учеников в каждому возрасту чье имя содержит букву a
8
Multiple Choice
Что выведет данная задача
A)| category | sum(quantity * price) |
|--------------|------------------------|
| Electronics | 1900 |
| Clothing | 300 |
B) | category | sum(quantity * price) |
|--------------|------------------------|
| Electronics | 1900 |
C) | category | sum(quantity * price) |
|--------------|------------------------|
| (Пусто) | (Пусто) |
D) | category | sum(quantity * price) |
|--------------|------------------------|
| Electronics | 1000 |
| Clothing | 1000 |
Что выведет данный запрос:
SELECT MIN(Возраст)
From students_score
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