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Last Updated: October 15, 2026
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In this short video we'll cover what foreign keys are, why they are important, how they differ from Primary Keys and how they ... Start your software dev career - calcur.tech/dev-fundamentals FREE Courses (100+ hours) ... In this tutorial, I run through an explanatory slide, detailing the background around specific Not Null, Default, Check, Unique and autoincrement explained with examples for create alter and dropping. # How do you add, drop, and rename MySQL 00:00:00 add UNIQUE CONSTAINT to a new table 00:01:12 add UNIQUE CONSTAINT to an existing ... This Video Contains 1:35 - primary key and unique key 6:35 - Alter 6:45 - Add 9:45 - Unique 13:55 - Not null 15:25 - foreign key ...
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