SQL : tools or a website to help with database normalization

SQL : tools or a website to help with database normalization
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I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
After that, type the word 'awesome' on your keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A quick introduction about me,
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SQL : tools or a website to help with database normalization
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