Just a moment…

Ready when you are

Start practising free today.

Thousands of MCQs with explanations, timed quizzes and past-paper style practice.

Practice smarter with trusted MCQs, clear explanations and focused exam preparation.

One short email when we publish fresh questions and practice material.

SQL & Databases MCQs | Mindaura

Home / Categories / Topics / SQL & Databases

Focused topic

Computer Science · Programming & Databases

ANullableBDuplicateCUnique and not nullDAuto-increment only

Why? A primary key uniquely identifies each row and cannot contain NULL.

Asked in: PPSC

SASubmitted by Super Admin

Medium · Computer ScienceOpen details

Computer Science · Programming & Databases

AUNIQUEBDISTINCTCLOOPDONLY

Why? SELECT DISTINCT eliminates duplicate rows from the result set.

Asked in: PPSC

SASubmitted by Super Admin

Easy · Computer ScienceOpen details

Computer Science · Programming & Databases

ASELECTBWHERECORDER BYDGROUP BY

Why? The WHERE clause filters rows before grouping or ordering.

Asked in: PPSC

SASubmitted by Super Admin

Hard · Computer ScienceOpen details