MB-8
Authored by Turdali Jumayev
Computers
University
Used 2+ times
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15 questions
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1.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Ushbu jadvalda qaysi ustun unikal qiymat qabul qiladi?
CREATE TABLE talaba (
id BIGSERIAL NOT NULL PRIMARY KEY,
first_name VARCHAR(50) NOT NULL,
last_name VARCHAR(50) NOT NULL,
email VARCHAR(50));
(a)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
PRIMARY KEY – bu ...
ma’lumotlarni yagonalik identifikatsiyasi
ma'lumotlarni o'chiradi
bir xil ma’lumotlarni kiritish imkonini beradi
ma'lumotlarni nusxalaydi
3.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Ma’lumotlarni yagonalik identifikatsiyasi - ...
(a)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
PRIMARY KEY ni bir nechta ustunga qo'llash mumkin.
Ha
Yo'q
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jadvaldagi ustunlarga PRIMARY KEY ni o‘chirish so'rovi to'g'ri ko'rsatilgan javobni belgilang?
ALTER TABLE table_name ADD PRIMARY KEY(field_name);
ALTER TABLE table_name DROP CONSTRAINT field_name_pk;
ALTER TABLE table_name DROP field_name;
ALTER TABLE table_name ADD field_name <type>;
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jadvaldagi ustunlarga PRIMARY KEY ni qo'shish so'rovi to'g'ri ko'rsatilgan javobni belgilang?
ALTER TABLE table_name ADD PRIMARY KEY(field_name);
ALTER TABLE table_name DROP CONSTRAINT field_name_pk;
ALTER TABLE table_name DROP field_name;
ALTER TABLE table_name ADD field_name <type>;
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jadvaldagi yangi ustun qo'shish so'rovi to'g'ri ko'rsatilgan javobni belgilang?
ALTER TABLE table_name ADD PRIMARY KEY(field_name);
ALTER TABLE table_name DROP CONSTRAINT field_name_pk;
ALTER TABLE table_name DROP field_name;
ALTER TABLE table_name ADD field_name <type>;
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