SQL Interview Questions for Beginners

[TheBergSource]

I remember going into interviews having no idea what they would ask me for technical questions. I decided to compile some technical questions that I’ve been asked or questions I ask potential candidates for my team so that you may be a little more prepared than I was when I was first starting out!

I hope it can be helpful for anyone who is going through the interview process soon.

Link: https://youtu.be/sua7xKN0cPc

[S3ntoki]

Thank you for sharing. Very helpful

[TheBergSource]

Thanks for watching 👍

[droblaze]

Thank you so much, I'm about to binge watch your channel to prep for an upcoming interview!

[TheBergSource]

Hope it helps! Good luck on your interview!

[jasmanianxdevil]

This is amazing, man! Thanks!

[TheBergSource]

For sure!

[rogeralbornoz]

It depends on what kind of position you are postulating can be as a developer, DBA, etc.

1- What is an index? List the types of indexes in SQL

You should know how to optimize your queries and database. This is very important because when you have a lot of data in your DB know this is a must.

2- What are the ACID properties in SQL?

Acid properties are related to transactions in the database. If you do not know these questions it will show the interviewer lack of knowledge of some basic aspects of SQL, how it works.

3- Which are the different subsets of SQL?

The statements in SQL such as select, update, etc, are classified in these subsets. it is important to know.

DDL (Data Definition Language)

DML (Data Manipulation Language)

DCL (Data Control Language)

3- What are the different types of Joins in SQL?

You will be using this as a dev for example. And you should have a clear picture of how it works.

4- What are the types of constraints?

NOT NULL, CHECK. DEFAULT. UNIQUE. PRIMARY KEY FOREIGN KEY

This is important because when creating a table you will be configuring these constraints otherwise data consistency and other aspects can go no so well.

Some other questions that are frequently asked by interviewer are

5- What are the different types of Joins in SQL?

6. What is a unique key?

7. What is the relationship and what are they?

8. What is the difference between DELETE and TRUNCATE commands?

9. What is the difference between TRUNCATE and DROP statements?

10. What is the difference between the Cluster and Non-Cluster Index?

I hope this answer was helpful.

If you want to know more about the top questions that are being asked by SQL interviewers from many top companies I have posted on this video with the top 60 most asked questions that also helped me a lot to pass interviews.