SQL stands for Standard Query Language. A language designed to manage data in relational databases also known as RDBMS. Widely used for database creation, deletion, row fetching, modifying data, etc. this language has been in the run for a very long time now.
SQL acts as a way to communicate with the database. It is used to perform various tasks such as, a company with a large database of products can retrieve a specific product or data using SQL commands.
With the surge in the database management systems, there has been an increasingly high demand for the programming skills of SQL in the market. To crack these opportunities candidates are likely to know the basics of SQL commands.
It is highly imperative to be aware of the basics of SQL. For example, here is a short, curated list SQL Interview Questions-
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- What is DBMS?
- What is a database?
- What is SQL?
- What are tables and fields?
- Different types of keys?
- Types of SQL joins. Explain.
- What are the different types of normalization?
For roles like data analyst SQL is the skill in demand, for advanced roles SQL skill are deemed to be highly critical.
You might be wondering why you should be spending your time learning about some age-old language when there are so many new programming languages in the market currently. However much you may want to learn new skills like Python, R or get deeper into data skills like Deep Learning, etc. the fact of ignoring SQL can cost you a lot.
While learning the fundamentals is essential, so it is to learn why it is important to do so. Here are a few reasons that will help you decide on your why-
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- SQL is all around
Most of the big companies like Microsoft, Instagram, Netflix, etc. use SQL. They have in-built systems to track their own performance, database systems and perform analysis.
- Highly in demand
If you are someone interested in data and are looking for a job in the same then, this is something you should focus on embedding in your skills. An interesting fact is that the number of job listings for SQL have been on the rise since 2017.
A list of the most commonly asked SQL interview questions can truly help you to be prepared for the opportunities.
There is a lot to learn about this language to attain those skills. Though preparing for SQL is very easy, what is important is that it needs practice. While preparing the interview questions it’s imperative that you make it a habit of writing the queries while learning the concepts.
Mugging up theory will not help you be prepared enough for the interview as much as practicing will do. So, let’s start by answering some the commonly asked SQL interview questions here-
- What is DBMS?
Database management System is a software that handles creation, maintenance and use of the database. This may include SQL, MySQL, ORACLE, RDBMS, etc.
- What is RDBMS?
Relational Database Management System is software that helps store data collected into tables based on the fields that are common in them.
- What is SQL?
SQL or Structured Query Language is a software to interact with the database for creating, deleting, inserting values or updates.
- What is a database?
A way to store data in an organized manner so that it can be accessed and manipulated in different ways. It is a collection of schemas, tables, queries, and views. The interaction with the database takes place with the help of SQL or MySQL.
- What are tables and fields?
A table is a set of data organized and stored in rows and columns while fields are the number of specified number of columns each database table has.
For example,
Table: Employee
Field: emp name, emp id, emp DOB
Data: Alek, 0001, 12-12-1986
These are some of the examples of what kind of sql interview questions are generally asked in the interviews to test your SQL skills but it’s not limited to these and depend on the role and profile you are aiming at.
Also, it is highly recommended that you keep practicing the theoretical knowledge of yours to evaluate and enhance your performance. As the saying goes, “Practice makes man perfect.”
This is where we end our conversation about the interview questions, and we urge you to look for more in detail to be well equipped with the basics of the SQL programming language and end up landing your dream role or position.
Hope that you are aware of what you should be prepared for to face your next interview. If you are wondering where to look in order to learn all these skills, then do check out the courses on Great Learning Academy Enroll now!
