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SUBMIT YOUR IDEAI used the fact that 1 + Null = Null, so when I pivoted my data, grouped by date and crane names as column headers, all I had to do was sum the row then filter for non-null values. But a lot of other solutions used fewer tools than I did, so maybe I'm not that clever after all. 🙂
Finally we get to do some analytics on the business fundamentals of Bob-the-builder's new enterprise! 🙂