Most Asked SQL Interview Questions and Answers for 2025

Is SQL Still Worth Learning in 2025?   

Absolutely.   

In this world driven by data, SQL (Structured Query Language) continues to be the foundational element behind data manipulation, data analysis, and even backend third-party DBMS design.  

After a successful career as a professional data analyst, backend developer, BI analyst, and data engineer, SQL remains a core technical skill with an emphasis on technical interview questions. 

Also Read: 7 SQL Interview Questions Most of Freshers Fail 

According to job trends on LinkedIn and Indeed, SQL stays among the top 5 skills in demand within tech. With companies today processing more data than ever, the need for professionals who can write efficient queries, deal with large datasets, and base their business decisions on data has only grown.   

Mastering specific SQL interview questions now asked in interviews will give you a great advantage if you are preparing for job interviews in the data/tech sectors this year.   

At Fusion Software Institute, we have compiled a list of the most asked SQL interview questions, and answers for 2025, and have updated them to be relevant, along with a matching hiring trend. Now, let's jump in and ace that prep!  

 Importance of SQL in 2025  

SQL continues to grow as one of the essential techniques in building professionalism on a data-dependent terrain, going from database maintenance to business intelligence and analytics.  

Structured data collected in large volumes by enterprises in all fields makes SQL the way for data analysts to obtain insight, write out reports, or support decisions in real-time. They say, "If a tool fits all, then it sits in the middle." It is a versatile tool, has a simple syntax, and fits well into the line of modern tools, including BigQuery, Snowflake, and Power BI.  

Data analysts, backend developers, and data engineers-the names vary as the value of a certain vocation set increases and decreases over time, it is versatility SQL brings into the picture that keeps it in demand and hence in supply.  

SQL is a primary language when working on relational databases and building dashboards; hence, any tech aspirant in 2025 will need to have it in his or her collection of languages.  

Basic SQL Interview Questions and Answers (For Freshers)  

1. What is SQL? 

SQL is a Structured Query Language used in the computing world to access, manage, and manipulate data in relational databases like MySQL, PostgreSQL, and Oracle.   

2. What are the types of commands available in SQL?  

SQL has five command types; Data Definition (DDL), Data Manipulation (DML), Data Control (DCL), Transaction Control (TCL), and Data Query Language (DQL).   

3. Difference between WHERE and HAVING?  

The difference between WHERE and HAVING is that WHERE filters rows before grouping, while HAVING filters rows after you group, which is done through a GROUP BY statement in an SQL query.   

4. What is a primary key?  

A primary key is a unique column that identifies every record in a table, it disallows NULLs and duplicate values.   

5. What is a foreign key?  

A foreign key is a column that establishes a relationship between the two tables by allowing the value of a primary key in another table, aiding relational integrity.   

6. What is a JOIN? List its types.  

A JOIN in SQL is used to join or combine multiple rows from differing tables, which can be INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.   

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7. What is normalization?