SQL Interview Questions Every Fresher Should Know

What is SQL:?

Explain that SQL (Structured Query Language) is used to store, retrieve, update, and manage data in relational databases.

What is the Difference Between WHERE and HAVING?

WHERE filters rows before grouping, while HAVING filters grouped data after aggregate functions are applied.

Explain SQL JOIN Types

Learn the purpose of INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN to combine data from multiple tables.

What are a Primary Key and a Foreign Key?

Understand how primary keys uniquely identify records and foreign keys create relationships between database tables.

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