MySQL supports some functions that can be used to extract the index position or the actual value from a set of values arranged as an array. ELT() and FIELD() are example of such functions. Let us understand about them in details.
“I Don’t Know” – DBAs Should Learn to Use This Phrase – Notes from the Field #119
[Note from Pinal]: This is a 119th episode of Notes from the Field series. If you know Mike Walsh, he is an amazing person to meet and know. He is technical expert, but along with that he is a true life coach. I am fortunate to be his friend. Every single time I meet him, I learn something as a human. In this episode Mike explains one of the most important things any DBAs should learn, which is to say “I Don’t Know”.
In this episode of the Notes from the Field series database expert Mike Walsh gives a challenge to all of us. He explains to us why we should study our mistakes. He is indeed very right that every mistake gives us opportunity to correct ourselves.
SQL SERVER – Extended Events to watch for using ColumnStore Index
In the recent past, I have written a number of posts around ColumnStore Index and how they function. Some of the nuances of working with ColumnStore Indexes are available in this blog for reference. I have also written a few posts around Extended Events. One of my DBA friends pinged me to check if there were any way to use Profiler to see how ColumnStore Indexes worked. Obviously, there was nothing much of help I could offer because there were actually none in reality.
SQL SERVER – How Enable Transparent Database Encryption (TDE) for Database Mirroring?
hey incidentally wanted to enable Transparent Database Encryption (TDE) on their server and wanted me to guide on how to enable.
SQL SERVER – Error 15559 – Error 912 – Script Level Upgrade for Database ‘master’ Failed
SQL SERVER – Error 15559 – Error 912 – Script Level Upgrade for Database ‘master’ Failed. Let us fix the error in this blog.
SQL SERVER – Introduction to SQL Azure Database Throttling
In standalone versions of SQL Server, if your SQL Server receives more concurrent requests than it can service simultaneously, it will queue the requests for later processing (subject to certain limits—generally available memory on the box). For example, if you have the max worker thread configuration option set to 100 and there are already 100 queries submitted to the server than any new requests are simply queued until one of the worker threads completes and can pick up the request. Except in fatal circumstances where DBA intervention is required this will allow all of the requests to eventually complete (or potentially timeout, if the client specified this setting). Let us understand about SQL Azure Database Throttling.
SQL SERVER 2016 – STRING_SPLIT Function Performance Comparison – Notes from the Field #118
SQL Server 2016 is around the corner. We already have SQL Server 2016 RC0 released and many of us have started to test out various aspects of the same. For many years users have created temporary tables as well as used cross apply functions to split a large string and make it a table. I think every single time when I was assigned this task, I disliked it as the methods I used never made me happy. Well, the situation is now changed now with STRING_SPLIT function in SQL Server 2016.
In this episode of the Notes from the Field series database expert Kathi Kellenberger explains about easy and amazing functions of SQL Server. Kathi is an amazing instructor, she was the SQL author I have read in my early career. Today she brings a very new topic for database experts. Read the experience of Kathi in her own words.