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Mar 17, 2020 at 17:53 answer added CL. timeline score: 1
Mar 17, 2020 at 16:32 comment added mustaccio You don't really need to put "new column" in the same table as the "old column" in order to compare them.
Mar 17, 2020 at 16:25 comment added Serhii Added example of design
Mar 17, 2020 at 16:25 history edited Serhii CC BY-SA 4.0
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Mar 16, 2020 at 12:56 comment added CL. What exactly do you mean with "uniqueness"? Is it forbidden to use a key that is already being used in any other week?
Mar 16, 2020 at 12:54 comment added CL. Show a concrete example of the proposed design, and the queries you're going to use on it. How many rows and weeks will there be?
Mar 13, 2020 at 22:08 history asked Serhii CC BY-SA 4.0