Time dimension

  • Adding few thoughts here:

    •Time Dimension is the most difficult dimension (IMO) to populate. Many guys (here) may oppose to me but I have seen long (& boring / interesting sometimes) discussions to populate week table in time dimensions. I can give you few crazy business questions / scenarios.

    oA week may overlap two months? Where to count it?

    oA week may overlap two years as well.

    oDoes the week means strictly 7 days?

    oMany industries have their own week definitions like Retail.

    oA week may start on Monday / Sunday.

    •Time zones are also crazy items to handle especially with Day Light Saving.

    Thus before jumping on table design, evaluate business requirements thoroughly. Creating a script for a table will not take more than 5 minutes, if you have reasonable good with DDL statements.

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