Top 45 SQL Interview Questions And Answers In 2025 | SQL Interview Questions 2025 | Simplilearn

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In this video, we cover the Top 45 SQL Interview Questions in 2025, designed to help both freshers and experienced professionals prepare for their next big interview. These questions range from SQL commands like SELECT, INSERT, and DELETE, to joins, normalization, indexing, and transaction management.

00:00 - Introduction
02:12 - What is SQL and its basic operations?
03:15 - What are the different types of SQL commands?
05:33 - What is a primary key in SQL?
06:42 - What is a foreign key in SQL?
07:46 - Difference between DELETE and TRUNCATE commands.
09:24 - What is a JOIN in SQL and its types?
12:09 - What is a NULL value in SQL?
12:44 - What is a UNIQUE key in SQL?
13:15 - What is a database?
14:19 - SQL vs. NoSQL databases.
15:30 - What is a table and field in SQL?
16:37 - Describe the SELECT statement.
17:44 - What are constraints in SQL?
18:51 - What is normalization in SQL?
19:57 - How to use the WHERE clause?
20:32 - Difference between UNION and UNION ALL.
21:03 - Analyze query result examples.
25:38 - What is a view in SQL?
28:19 - How to update a value in SQL.
29:01 - Types of JOINs in SQL with examples.
29:29 - What is a subquery?
30:43 - What are correlated subqueries?
31:13 - What is a transaction in SQL?
31:45 - What are ACID properties in SQL?
33:29 - How to implement error handling in SQL.
35:12 - Normalization vs. Denormalization.
37:58 - What is SQL injection?
38:33 - How to create a stored procedure in SQL?
39:05 - What is a deadlock in SQL and how to prevent it?
40:14 - Difference between IN and EXISTS.

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