To provide data analysis you may need to perform some basic trend analysis. For example, if you want to identify the percentage of change in the number of orders received from one month to the next. The challenge to providing that on the fly is the change can be either an increase or a decrease, […]
2007-03-02 (first published: 2007-01-25)
6,482 reads
For fellow Canadians and neighbours to the south, you may find useful a function to validate the formatting of a Canadian postal code. More than once I've had to work with web programmers on checking that a postal code meets the A1A1A1 style, so carry around a function that simply returns a true/false bit if […]
2007-01-15 (first published: 2007-01-05)
1,064 reads
There are many ways to format dates, and rather that reinvent the wheel each time I've found it helpful to have a user defined function always available. As a function it of courses processes on each row, and to enable the most flexibility the formatting style is passed simply as a parameter. Year month and […]
2005-08-31 (first published: 2005-08-25)
468 reads
Came across a great script from Ken Kaufman on copying backups using xp_cmdshell. Thought I'd contribute a script I wrote that builds on that to restore the latest production backup to a testing or development server. In this case I routinely create all my production backups to a network share and then use that source […]
2002-12-16
649 reads
I am responding late to a T-SQL Tuesday invite from John Sterrett. John’s call...
It’s been forgotten about and neglected for few years but I’ve decided to dust...
I am honored to announce that I have been renewed as a Microsoft MVP...
Comments posted to this topic are about the item How a Legacy Logic Choked...
Comments posted to this topic are about the item Navigating Multi Platform Realities in...
I have tried a number of times to export and then import my SSMS...
For the Question of the day, I am going to go deep, but try to be more clear, as I feel like I didn't give enough info last time, leading folks to guess the wrong answer... :) For today's question: You’re troubleshooting a performance issue on a critical stored procedure. You notice that a previously efficient query now performs a full table scan instead of an index seek. Upon investigating, you find that an NVARCHAR parameter is being compared to a VARCHAR column in the WHERE clause. What is the most likely cause of the query plan regression?
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