peter2501 (9/7/2012)
Yes, it works.Thanks, now I can dig into the script what it really does so I can also try to understand.
Thanks very much.
You're welcome.
A brief explanation:
The Tally table is used to generate a set of "dummy" logins for each date in the range (the NULL Username ensures these aren't counted). In the query out of your table, I've truncated each login time to the day (without time stamp), so I can use this for GROUP and ORDER BY. The range of records starts at @Start but ends before @End + 1 day.
Hope that helps.
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St