A number of business processes require you to distribute a value over a date range. However, if your distribution keys and values don’t add up perfectly or aren’t perfectly divisible, it’s very easy to get rounding errors in your distributions.
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Distributing values with overlapping ranges
Today, we’re going to look at how to distribute values with what I call “overlapping ranges”. What I mean by that is that the value that you need to distribute has a given range and the objects you want to distribute the values to are also defined as ranges. Sound complicated? It doesn’t have to.
How to build a histogram in T-SQL
Talk to SQL Server developers or DBAs about histograms, and they’ll inevitably think of index statistics. However, a task you may encounter some day is to calculate the distribution of numbers in a table. And although there’s no quick built-in function to do this, it’s not as difficult as you may think.
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