Basics of SQL databases 🗄️

Simple and useful quiz to test basic knowledge of SQL databases.

Tavsif

Databases, Computer, SQL

Teglar

Savollar

1 daqiqa

Har bir savolga

7:14

Oʻrtacha vaqt

3,0

Tanlov balli

Ishtirokchilar

Testni boshlash

1 ta fikr

Hip Goose 2020-yil, 3-Iyn

Q. What constraint should used for unique values.
Option contains both 1.Primary key and 2.Unique key ;
my question is why only primary key is correct...

Waiting for some reasonable answer.

Fikr bildirish uchun testni ishlang