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Editorial Team
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Asked: 2026-05-19T00:32:48+00:00

table users userId name company company_address url 1 Joe ABC Work Lane abc.com 2

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table users

userId    name     company    company_address     url

1         Joe       ABC       Work Lane         abc.com

2         Jake      ABC        Work Lane        xyz.com

3         tom       XYZ       Job Street        abcde.com

4         jim      XYZ       Job Street         fexyz.com

the second table

id          name          favourite_food_1          favourite_food_2   

1           Sam              Curry                  Steak       

 2           Lucy           Chicken                      Burgers

if the table don’t fit for the 1NF,why? thank you.

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1 Answer

  1. Editorial Team

    The first table fits 1NF. The second does not – there’s a repeating group with the two favorite food fields. Not everyone necessarily has two favorite foods (or any favorite foods at all, or has 3+ favorite foods), so those fields are nullable, and therefore causes the table to fail 1NF.

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