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.
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.
In the interview and I end up seeing candidates failing to answer this question about the Stored Procedure Modified recently.
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.
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.
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.
I do a performance tuning consulting to earn my livelihood. Once in a while, I end up customer who wants to interview me to check if I know SQL. I absolutely have no problem with the interview. This is a good thing and it gives me confidence that they are serious with their project. With said that once in a while the senior guys on the other side are so busy they end up having my interview with junior (novice) experts. I often struggle with this interview question and answer with beginners because my answers are based on experience and they often do not match what they have learned in school/collage.