Question: Do MAX Function Scan Table to retrieve the data?
Answer: Yes, if there are no indexes to help retrieve data. Let us learn it today.
Negative Identity Column – SQL in Sixty Seconds #101
I had a very interesting story to tell about a negative identity column from my recent Comprehensive Database Performance Health Check.
List All Parallel Queries – SQL in Sixty Seconds #098
During the recent Comprehensive Database Performance Health Check, my client asked me if I have a query which can list all the parallel queries.
Alter Index Add Column – Workaround – SQL in Sixty Seconds #097
However, while modifying it we faced a unique challenge that we can’t actually alter index to add columns. Let us discuss that today.
Fastest Way to Retrieve Rowcount for a Table – SQL in Sixty Seconds #096
What is the fastest way to retrieve rowcount for a table? Whenever I am helping my clients with their SQL Server, I get this question.
Where are Table Variables Stored? – SQL in Sixty Seconds #095
A very popular question we will answer today Where are Table Variables Stored? Recently I have posted a few videos on my YouTube Channel,
Statistics That Never Auto Update: Find the NORECOMPUTE Flag
Statistics that never auto update usually carry a hidden NORECOMPUTE flag, set when an index was created. This post builds a demo table, shows the flagged statistic go stale while its neighbor updates itself, and lists every flagged statistic in a database. It also shows which maintenance commands clear the flag and which keep it.