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Eleven SQL Server Interview Questions That Look Far Too Easy

August 20, 2026
Pinal Dave
SQL Interview Questions and Answers
Clustered Index, SQL Index, SQL Performance

These eleven SQL Server interview questions look far too easy, and every one of them has stopped somebody senior.

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SQL Server Deadlocks

SQL Server Deadlocks – Interview Q and A

June 23, 2023
Pinal Dave
SQL Interview Questions and Answers
Deadlock, SQL Performance

Earlier this week, I wrote a few blog posts on SQL Server Deadlocks. Lots of people asked me if I could convert them into Interview Questions and Answers

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CumulativeTotalCalculation

SQL SERVER Challenge – Cumulative Total Calculation

June 16, 2023
Pinal Dave
SQL Interview Questions and Answers
Challenge, CTE, Ranking Functions, SQL Scripts, SQL Sub Query

Today we will see a very interesting SQL SERVER Challenge about Cumulative Total Calculation. During a recent Comprehensive Database Performance Health Check.

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SQL SERVER – Count Occurrences of a Specific Value in a Column

June 12, 2023
Pinal Dave
SQL Interview Questions and Answers
SQL Group By, SQL Server

Here is the exact question – How to Count Occurrences of a Specific Value in a Column? Well, honestly, the answer is very simple.

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SQL Server Interview Questions and Answers: Updated 2021

SQL Server Interview Questions and Answers: Updated 2021

March 4, 2021
Pinal Dave
SQL Interview Questions and Answers
SQL Book, SQL Server

I have just released an updated version of my most famous SQL Server Interview Questions and Answers: Updated 2021 after 10 years.

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nvarchar

What is N in nvarchar? – Interview Question of the Week #301

January 21, 2021
Pinal Dave
SQL Interview Questions and Answers
Data Type, SQL Server, SQL String

Question: What is N in nvarchar?

Answer: n in nvarchar or nchar stands for world national. Let us learn today about datatypes.

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Efficient Query

How to Write Efficient Query? – Interview Question of the Week #300

November 1, 2020
Pinal Dave
SQL Interview Questions and Answers
Query Rewrite, SQL Milestone, SQL Server

Question: How to Write Efficient Query?

Answer: There is no right or wrong answer to this question. Let us learn about it today.

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