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detecting clumps
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Most teachers grade on the traditional grading scale... 90-100 is an A, 80-89 is a B... and so on.

There are variations in grading which "they" call the curve... in one such mechanism it's called "clumping" or "clumping edge detection". Sadly I've only found the one reference and there is nothing about SQL...

It seems to me that there should be something ... In my case I'm doing grades but it would be quite useful in processing logfiles comparing the clumps using dates.

Thanks.

(hope I'm making sense)