[Notes from Pinal]: First of all, last week SQL Server 2016 released. If you have not downloaded the developer version for free. You can download from here. SQL server 2016 has many different features which are related to performance and stability. One of the feature which attracted me very much is stretch database. I am sure of the name, you might have understood that it is about extending the current features of the SQL Server. Well, the feature is very interesting, and to understand how it works, you will have to read this entire blog post.
SQL SERVER – How Much Free Space I Have in My Database?
This is one of the simplest query that I wrote for one of my consulting customers who asked me. When I was discussing with the customer on some of the best practices of working with SQL Server, I was telling him not to use the autogrowth as a regular feature to use. I wanted the DBA to make sure that the autogrowth never gets called. The immediate question was – how do I know I need to increase my database files? When should I be doing them? In What maintenance cycle should this be done to find Free Space.
Sort Query Using Dynamic Variables Without EXEC – Interview Question of the Week #074
It does not matter which version of SQL Server we are using, I think this question is going to be there universally all the time when people want to sort query using dynamic variables. Trust me, this is indeed a popular question. After 14 years of experience in the industry, just last week, I was asked this question when one of my clients was evaluating me to tune their queries. Well, for a moment I thought the client should know that I know these kind of questions. Next moment, I realize that this is my opportunity to impress them as they do know the answer.
SQL SERVER – Puzzle – Solve Splitting Strings Puzzle
Some puzzles come as legacy and a great way to do sometimes interviews. In the past, I have written some innovative solutions when it comes to splitting strings inside SQL Server. One of them is at: SQL SERVER – Split Comma Separated List Without Using a Function. Though this is a good solution, many have some back to say this is not a clean or a native way to work with strings. Let us learn about Splitting Strings puzzle.
What is NOT NULL Constraint? – Interview Question of the Week #073
I am an independent database consultant and I focus on SQL Server Performance Tuning. The other day when I was working with my customer on a large project on performance tuning, we noticed a table which had created performance issues and it contains a huge amount of NULL data. In this blog post we will learn about NOT NULL constraint.
SQL Server – InMemory OLTP Hash Collisions Performance Overhead
Sometimes the best of learnings are based on people’s questions. I always feel when questions are asked, more the learnings are. In a recent session for a customer who had implemented SQL Server 2014 InMemory OLTP in their systems, they were getting bad performance even when they were using InMemory OLTP.
SQL SERVER – FIX: Error 1807 Could not obtain exclusive lock on database ‘model’. Retry the operation later – Part 2
I have always mentioned in the blogs that the most sought out blogs would be around troubleshooting or around specific error messages. These blogs are the biggest source of page views from various search engines. I love getting these error messages and an opportunity for me to learn something new. Here is my first blog written in the year 2010 and I still get questions around the blog via emails. FIX: Error: 1807 Could not obtain exclusive lock on database ‘model’. Retry the operation later. Let us learn to fix error 1807 in this blog post.