Update the content for normalization

[unmeshvrije]

Update the PR!

Regards, Unmesh Joshi

On Mon, 19 Sept 2022 at 11:14, robvk @.***> wrote:

@.**** requested changes on this pull request.

In databases/sql/normalization.md https://github.com/HackYourFuture/study/pull/24#discussion_r974025651:

-	ID (PK)	Name	Country Code (FK)
-	1	Apple	US
-	2	Lenovo	CN

+- DROP column Contact. +- ADD column Phone with the type int.

I don't think we want the phone number to be an int, seems like a bad idea

In databases/sql/normalization.md https://github.com/HackYourFuture/study/pull/24#discussion_r974026028:

-If you want to increase your understanding, you can study the following materials: +2NF is violated here because + +``` +porj_budget (non prime column)

Typo, think you mean: proj_budget

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