SQL FOREIGN KEY: The Ultimate, Easy Guide for Newbies

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Newbie? Then an SQL foreign key may be foreign to you.

You may have heard different opinions about SQL foreign keys. If you haven’t, soon you will. Or your experience will affect your view. The main thing to know is, foreign keys are a must in relational databases.

Yet, some developers may remove or ignore foreign keys when facing some complications. So, what to do? To use the foreign key or not to use it? Will there be times when you won’t need to use them?

This guide is for you to see how important this thing is. You will also know some gotchas in code and learn how to fix them. Besides, of course, we’ll use practical examples. There’s nothing you can’t handle.

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