Computer Science, asked by vkm787, 1 year ago

give it's answer please?

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Answered by nancyyy
1
City because each person can be from different cities so primary key cant be applied on it as it may not have fixed values.

vkm787: please read the question once again it is asking columns not column
nancyyy: oops i m sorry
nancyyy: another will be name because..people can have different names worldwide
vkm787: yup thanks
Answered by siddhartharao77
1
Columns with name and city cannot be specified as Primary key.

Ex:

In brainly, More than 10 people are having the same name which I have and also in that 2 to 3 people are from my city.

Mobile number and userID will be constant. 


Hope this helps!

siddhartharao77: :-)
vkm787: #crystal clear answer
siddhartharao77: Thanks
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