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SQL Interview Questions and Answers

4.25
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Beginner

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2.25 Hrs

Learning hours

22.1K+
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SQL Interview Questions and Answers

2.25 Learning Hours . Beginner

Enrol free with email

Skills you’ll Learn

SQL Queries
Normalization
E-R Diagram
Sub-queries

About this course

SQL is one of the essential requirements in tech industries. Data management has now become an integral part of all companies. Thus, every candidate must have a brief idea of SQL. DBMS is largely popular and is maintained by all industries to maintain their data. Hence, it becomes essential to prepare for SQL interview questions.

This free course will help you pass your SQL interviews by familiarizing you with all the critical SQL Interview Questions and Answers. Whether it's the role of an SDE or the role of a data analyst, SQL Questions are definitely asked in the interview. In any tech job role, one will be working with data, which has to be stored somewhere. If we have to extract specific data items from the entire dataset/table we have, we would need knowledge of SQL. Thus, understanding SQL and getting familiar with its queries becomes important. Hence, we are introducing this free SQL Interview Questions and Answers course through which you will go through SQL queries, Normalization queries, ER diagram queries, and sub-queries. You will also go through interview questions based on two projects called Broadband Management System and HR DBMS. This free course has all the essential SQL queries for interviews, and you will also learn to solve tricky SQL queries for interviews. To get to know all the SQL questions and answers enroll in this free SQL Interview Questions and Answers course and face the interviews with utmost confidence.

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Course Outline

Introduction to Hive Hands-On

Hive is a data warehouse used to support interaction between the user and HDFS. This course will give you a demonstration using sample problem statements for your better understanding.

Basics of SQL
Normalization E-R Diagram and Sub-queries
Broadband Management System
HR DBMS
Summary

This comprehensive module on Organizational Behaviour, covers the concept, importance, elements, levels, types, and objectives of the field. It provides a deep understanding of the subject to enhance interpersonal and communication skills and create a positive work environment.

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Earn a certificate of completion

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Get free course content

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Learn at your own pace

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Master in-demand skills & tools

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Test your skills with quizzes

SQL Interview Questions and Answers

2.25 Learning Hours . Beginner

Enrol free with email

Frequently Asked Questions

How do I prepare for an SQL interview?

There are a few frequently asked questions and a few important topics in SQL. It is more than sufficient to prepare them to crack interviews. Free courses offered by Great Learning on SQL interview questions and answers can guide you through them.

What are the important questions in SQL?

Questions will be usually asked on:

  • Key elements of a database
  • Relational keys
  • Joins
  • Select queries
  • Data modelling
  • Star schema
  • Snowflake schema
  • Dimension and fact table types
  • Commands in SQL
  • Types of queries

How do I start a SQL query?

SQL START QUERY starts/executes any query that is prepared or previously executed.

 

What is normalization in SQL?

Normalization is the process of restructuring a relational database with normal forms to reduce data redundancy and improve data integrity.

What are normalization rules in SQL?

There are 3 rules in normalization :

     1. Every table should have:

  1. a primary key
  2. rows of equal length
  3. no 2 columns with the same kind of data

     2.   Every table should have no columns depending only on the primary key(if the primary key is composite).

     3.   Every table should have no columns not depending on the primary key at all.

What are the advantages of SQL?

 

  • No coding skills required
  • Fast query processing
  • Portable
  • Standardized language
  • Interactive language
  • Multiple data views

What are the Applications of SQL?

SQL can be used as:

  • Data Definition Language (DDL)
  • Data Control Language (DCL)
  • Data Manipulation Language DML)
  • Server and Client Language 

 

Will I get a certificate after completing this SQL Interview Questions free course?

Yes, you will get a certificate of completion for SQL Interview Questions after completing all the modules and cracking the assessment. The assessment tests your knowledge of the subject and badges your skills.
 

How much does this SQL Interview Questions course cost?

It is an entirely free course from Great Learning Academy. Anyone interested in learning the basics of SQL Interview Questions can get started with this course.
 

Is there any limit on how many times I can take this free course?

Once you enroll in the SQL Interview Questions course, you have lifetime access to it. So, you can log in anytime and learn it for free online.
 

Can I sign up for multiple courses from Great Learning Academy at the same time?

Yes, you can enroll in as many courses as you want from Great Learning Academy. There is no limit to the number of courses you can enroll in at once, but since the courses offered by Great Learning Academy are free, we suggest you learn one by one to get the best out of the subject.

Why choose Great Learning Academy for this free SQL Interview Questions course?

Great Learning Academy provides this SQL Interview Questions course for free online. The course is self-paced and helps you understand various topics that fall under the subject with solved problems and demonstrated examples. The course is carefully designed, keeping in mind to cater to both beginners and professionals, and is delivered by subject experts.

Great Learning is a global ed-tech platform dedicated to developing competent professionals. Great Learning Academy is an initiative by Great Learning that offers in-demand free online courses to help people advance in their jobs. More than 5 million learners from 140 countries have benefited from Great Learning Academy's free online courses with certificates. It is a one-stop place for all of a learner's goals.

What are the steps to enroll in this SQL Interview Questions course?

Enrolling in any of the Great Learning Academy’s courses is just one step process. Sign-up for the course, you are interested in learning through your E-mail ID and start learning them for free online.
 

Will I have lifetime access to this free SQL Interview Questions course?

Yes, once you enroll in the course, you will have lifetime access, where you can log in and learn whenever you want to. 
 

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