Most asked top Interview Questions and Answers & Online Test
Education platform for interview prep, online tests, tutorials, and live practice

Build skills with focused learning paths, mock tests, and interview-ready content.

WithoutBook brings subject-wise interview questions, online practice tests, tutorials, and comparison guides into one responsive learning workspace.

Search the library
Prepare Interview

SQL Interview Questions and Answers

Question: What operator tests column for the absence of data?
Answer: IS NULL operator.

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful? Yes No

Most helpful rated by users:

Copyright © 2026, WithoutBook.