Replace correlated subqueries with windowed counts, dates, and running totals, preserve detail rows, and keep useful EXISTS filters.
Performance Challenge – Write Efficient Query – SQL in Sixty Seconds #140
Recently while working with my client I ended up in a very interesting situation where my client wanted me to write an Efficient Query.
Find Outdated Statistics – SQL in Sixty Seconds #137
Is it possible that your statistics are many years old but still are valid? It is difficult to find Outdated Statistics is not as easy as it seems.
What is EDGE in SQL Server Execution Plan? – Interview Question of the Week #298
Question: What is EDGE in SQL Server Execution Plan?
Answer: It is the arrow or the line which goes from one operator to another operator.
How to Capture Deleted Rows Without Trigger? – Interview Question of the Week #297
Question: How to Capture Deleted Rows Without Trigger?
Answer: I was recently asked by my client during the Comprehensive Database Performance Health Check.
Priority Boost and Performance – SQL in Sixty Seconds #131
Enabling Priority Boost does not mean that you get performance from your SQL Server. It may be quite opposite. SQL in Sixty Seconds.
SSMS Efficiency – Replace STAR – SQL in Sixty Seconds #130
You might have heard that SELECT * is bad for queries performance. Let us learn in today’s video how we can replace STAR (*) by column name.