Have you ever needed to generate a list of dates for the last 30 days. There are lots of different ways to do this with TSQL, but one way is with a recursive CTE. You can then left join against …
Recursive CTE to Calculate Dates for the Last 30 Days Read more »
After the last post on Cumulative Distribution Function (CDF) or as it is known in TSQL CUME_DIST(), I realized that although I showed how to use it, I didn’t really explain what it means, or when to use it. That …
Cumulative Distribution Function (CDF) – Analyzing the Roll of Dice with TSQL Read more »
It is handy to have a SQL Restore script ready to go for every backup that you run. Here is a script that will help with that.
SQL Server 2017 introduces a new column in the sys.dm_db_file_space_usage system table. The column is modified_extent_page_count, which tells how many pages have been modified in your data file since the last full backup. What is really interesting about this is that with …
Determining how much of your data file has been modified Read more »
From time to time I get asked about checkDB, and there are many solutions out there, but I have one that I generally use that is very simple and does the job. The script below created a stored procedure in …
Today I had the opportunity to present on TempDB to the Spokane SQL Server users group (PASS Chapter). The session was titled TempDB – Do This and Don’t Do That”, and it covers a bunch of tips and best practices around …
A while back a wrote a blog post with a query to Visualize the VLF’s in your database. Today I have an update to that script. Here is an updated script that has adds another column called “TextStatus” to the …
Updating SQL Server statistics may not be as obvious as it may sound. Imagine this scenario. I invite you over for dinner and a game of Scrabble. After dinner, I start to do the dishes, while you set up the …
Today I am presenting my “TempDB – Do This and Don’t Do That” session at SQL Saturday Redmond. Here is the download of the presentation and samples. StedmanTempDbPresentation.zip Some of the sample code from the session: I hope …
So you are checking your database with DBCC CheckDB and of course if you are like me you use the WITH NO_INFOMSGS parameter. But it turns out that CheckDB is taking longer to run that you expected, and you want …