Top 25 SQL Interview Questions And Answers|SQL Support Interview Questions And Answers| Simplilearn

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Top 25 SQL Interview Questions And Answers by simplilearn is dedicated to help aspiring data analysts and business analysts to understand the SQL principles and be ready to asnwer the toughest SQL Support Interview Questions And Answers.

Here's a sneak peek at some of the key questions we'll be tackling:

00:00:00 Introduction to Top 25 SQL Interview Questions And Answers
00:01:43 What is SQL and why is it important?
00:02:31 Explain the difference between SQL and NoSQL databases.
00:03:00 How do you retrieve unique values from a column?
00:03:27 What is normalization and denormalization?
00:03:50 Explain ACID Properties in SQL.
00:04:40 What is the difference between GROUP BY and HAVING clause in SQL?
00:05:07 Explain the Difference Between UNION And UNION ALL
00:05:25 What is a SubQuery?
00:05:45 How Can you Prevent the SQL Injection in your Queries
00:06:07 Explain the difference between the Primary key and foreign key
00:06:32 What is the Difference between WHERE Clause and HAVING Clause
00:06:53 Explain the concept of INDEXING in SQL
00:07:21 What is a STORED Procedure?
00:07:43 How Can you Find 2nd or nth highest Salary in SQL
00:08:19 Explain the difference between a primary key and unique key in SQL Table
00:08:42 What is a VIEW in SQL?
00:09:01 What is the Purpose of SQL CASE Statement?
00:09:19 How can you update data in SQL Table?
00:09:54 Explain the difference between a clustered index and non-clustered index
00:10:20 What is the Purpose of SQL JOIN Clause
00:10:49 Queries in Realtime
00:11:12 Write a SQL Query to retrieve the count of all the rows in your table
00:11:48 Write a SQL Query to find the average salary of all the employees in a specific department
00:13:16 Write a SQL Query to Display the top 5 highest paid employees from a table
00:14:19 Write a SQL Query to update the salary of all the employees by 10% increment
00:15:07 Write a SQL Query to find the second most common value in a column

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