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.
Understanding Database Scalability – Vertical and Horizontal
Since I have started my consulting engagements with customers around the world, I have been asked interesting queries from time to time. In a recent customer call, the customer insisted I assist them in taking a call on if they need to buy one server with 64 cores or if they need to buy 2 servers of 32 cores. I had to explain that it is always not that simple to answer the same. After close to 30 mins of conversation they understood finally what I was talking. I took a moment to blog about this engaging conversation about database scalability.
Hey DBAs – What Are You Assuming/Missing Today? – Notes from the Field #122
[Note from Pinal]: This is a 122nd episode of Notes from the Field series. This story about Shepherd DBA, Teacher and Mentor. If you know Mike Walsh, he is an amazing person to meet and know. He is a 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 of “Hey DBAs” Mike explains one of the most important things any DBAs should learn, which is to say “I Don’t Know”.
SQL SERVER – Computed Column and Conditions with Case Statement
When I do not find anything on my blog, I write a blog post about it, so next time I do not have to recreate the scripts from the beginning. Just another day, I was doing performance tuning for an organization, I had to create a computed column with CASE statement and I suddenly realize that I do not have such a script on my blog so I decided to write a blog post on this subject.
SQL SERVER – Identify Table Where Clustered Index is Not a Primary Key – DMV
Let us first see script which will return us tablename with schema where clustered index is not a primary key.
SQL SERVER – What is WRK file in Log Shipping?
Several customers use log shipping for disaster recovery across a remote data center. If you are reading this blog, I would assume that you already know SQL Server log shipping If you don’t, then please go through online resources to read the basics. Here is an interesting fact which I learned recently about the WRK file in log shipping. I know some of these are around as theory, but there is no concrete way to understand the nuances of what these files actually mean.
Is your SQL Server running slow and you want to speed it up without sharing server credentials? In my Comprehensive Database Performance Health Check, we can work together remotely and resolve your biggest performance troublemakers in less than 4 hours.
Once you learn my business secrets, you will fix the majority of problems in the future.
Have you ever opened any PowerPoint deck when you face SQL Server Performance Tuning emergencies? SQL Server Performance Tuning Practical Workshop is my MOST popular training with no PowerPoint presentations and 100% practical demonstrations.
Essentially I share my business secrets to optimize SQL Server performance.