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controversy... i didn't get the answer, but i think i'm right. As others have said, i didn't get any null years as i took the last 4characters from the date string as the year, so that may have affected the data. Poor John Coltrane was ignored, but i think he should be joint 3rd.
I may have handled some of the elements differently than the solution if I were performing the analysis --- for instance I probably would have calculated an average for the artist using a weighted average of all reviews and...
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...I also used the min max year the albums were released for each artist instead of which came first and last in the list....
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I think like most, there were a) no null records (a RIGHT function did the trick) which resulted in b) a differing output. I also removed Various Artists (not particularly clear in the instructions). I realized later that I didn't need the second Summarize but moving forward 😊
