Today we are going to see a very simple but brain teaser puzzle. This puzzle is about Deleting Qualified Rows From Multiple Tables.
It has been a while since we have seen a puzzle so let us do a small puzzle today. Actually, this is a very simple puzzle if you have worked with SQL Server for a while. I got an email from one of the readers from the blog post and he wanted me to correct the following query which he had written. Well, I have been working with SQL Server for over 19 years and I often do not remember the syntax and have to look up online. Here is a very simple puzzle for you which involves Aggregate and Subquery.
I often get emails from my blog readers asking various types of questions. Here is one of the interesting questions from a reader about Relating Unrelated Tables. Let us go over it in detail.
Earlier last week, I was presenting various questions about SQL Server 2017 at PASS in Seattle. However, during one of the session, I was fortunate to meet SQL Server Expert Christopher Savage. He shared a very interesting puzzle with me. I have been trying to solve the puzzle for a while, but I have no answer for it. Let us see the puzzle about DateTime2 Conversion in SQL Server 2017.
It has been awhile since I asked any puzzle on SQLAuthority.com, Let us see a very simple puzzle today which involves execution plan as well.
First of all this observation is only applicable if you are using SSMS 17.7 build. It was very interesting to me that I was able to find two Miscellaneous categories in Database Property Option for SQL Server. Please note the version of SQL Server which I have connected to SSMS 17.7 is also SQL Server 2017. If you try following on any other SSMS version you may not get the same results.
There are many different datetime related functions such as DAY, MONTH, YEAR, DATEDIFF, etc available in SQL Server. For example, YEAR function can be used to extract year value from a date.