Question: Can an Index Reduce Performance of SELECT Query? There is a huge misconception that Indexes does not impact SELECT queries negatively.
How to Find Definition of Computed Column in SQL Server using T-SQL? – Interview Question of the Week #233
Question: How to Find Definition of Computed Column in SQL Server using T-SQL?
Answer: A very fair question, I received the other day.
What is Source_Database_ID in Sys.Databases?- Interview Question of the Week #232
Question: What is Source_Database_ID in Sys.Databases and why it is mostly NULL? Very interesting question, I received indeed.
What is Faster, SUM or COUNT? – Interview Question of the Week #231
Question: What is Faster, SUM or COUNT? Answer: Both are the same. I was asked this question during my Comprehensive Database Performance Health Check.
What are the Different Types of SQL Server CHECKPOINT? – Interview Question of the Week #230
Question: What are the Different Types of SQL Server CHECKPOINT?
Answer: There are four different kinds of checkpoints in SQL Server.
How Dirty or Clean is SQL SERVER’s Memory? – Interview Question of the Week #229
Question: How Dirty or Clean SQL SERVER Database is (by Memory)?
This blog post is the follow up of the earlier blog post on the same subject.
How Much Memory is in Locked Pages? – Interview Question of the Week #228
Question: How Much Memory is in Locked Pages? Answer: Before we see the answer to this question, I suggest you read the blog post here first.