This is a classic problem known as LIS (longest increasing sequence) that was discussed in CACM decades ago. You can find it in HOW TO SOLVE IT BY COMPUTER by R.G. Dromey (1981) ISBN: 0-13-188862-...
T-SQL PuzzleCommented on: 1 year ago
(November 20, 2012)
The reason for the Hexagons in the original game grid is that this was based on the game Hex, (http://en.wikipedia.org/wiki/Hex_game). It was invented independently by John Nash and Piet Hein. It had...
Solutions to TSQL Challenge – Reoccurring VisitsCommented on: 3 years ago
(July 14, 2011)
I am late to the party, but here goes.
Let's assume we have a the usual Calendar table. Use it to build a table of date pairs. Use the date pairs flag each visitor as a today and/or yesterday...
Logic Puzzle – Dice SubstituteCommented on: 5 years ago
(July 2, 2009)
You are in a British pub, so they will have a set of 6-6 dominoes behind the bar. Pull out the blanks, discard the double. Throw the titles in a hat and draw with replacement to simulate dice....
In managing a database or sometimes numerous databases, we often get caught up in the day-to-day maintenance and lose sight of the other principles we know are critical to ensuring optimal performance. Here’s a quick refresher....More
Alerts represent a great way to take a proactive stance on being notified or alerted when something ugly, potentially ugly, or important happens on a SQL Server. On most servers that I manage, I typically deploy a whole bevy of different alerts....More
When setting up HA or HA+DR solutions with SQL Server AlwaysOn Availability Groups, it's critical to remember that the basic unit of failover in these scenarios is the availability group (or the group of user-defined databases)....More