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 Domain Controller – Interview Question of the Week #072
This blog is an outcome of questions asked by my client and answer provided to them after doing a lot of searches on the internet. I am very confident that sooner or later, these questions will show up in interview questions and answers. Let us understand about the SQL Domain Controller.
Q1. Can I install SQL Server on a domain controller?
Answer: This is no restriction in SQL Server setup which would block the installation of SQL Server on Domain Controller. So, yes – it can be installed.
Primary Key and Null in SQL Server – Interview Question of the Week #071
Question: Can Primary Key on any table contain NULL values? Why? Answer: Primary key on any table in SQL Server can not contain a null value.
List All the Stored Procedure Modified in Last Few Days – Interview Question of the Week #070
In the interview and I end up seeing candidates failing to answer this question about the Stored Procedure Modified recently.
SQL SERVER – Q&A: SQL Clustering Virtual Server Name and Instance Name
Of late some of the troubleshooting scenario I am getting involved is amazing. Though some of them are complex, it gives me a unique opportunity to learn and try something new to share later with you folks. Recently I was contacted by a team who takes care of SQL installations. Since they are very new to SQL Server cluster installation and had basic questions. Let us learn more about SQL Clustering.
How to Insert Multiple Rows in a Single SQL Query – Interview Question of the Week #069
There are so many different databases in the world and many of them use the language SQL for their programming. It is very easy to assume that if they are using SQL, we can easily use code from one database to another database. Unfortunately the reality is very different, not all the scripts from one database works in another database. Today we will see very interesting question where the user asked a question about inserting multiple rows in a single SQL query.
SELECT One by Two – Interview Question Extended – Part II
The puzzles are interesting and in most cases, if we try to play around a little bit more, many more interesting extensions can be added. A couple of weeks back, I wrote a round – SELECT One by Two – Why Does SELECT 1/2 Returns 0 – Interview Question of the Week #067. It brought some good interactions as comments over the blog and I was happy we were all excited about something as simple as this.