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  • Well done Bart, I think you got it! Let me try to understand how you write the codes :) Commented Apr 8, 2019 at 6:49
  • I will add some clarification in my answer. :) Commented Apr 8, 2019 at 6:56
  • Done. I also simplified CTE2, since it grouped and selected unnecessary fields. Commented Apr 8, 2019 at 7:19

lang-sql