Скачать или смотреть Using MySQL to stop freeloaders (in only 8 minutes)

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Using generated columns to stop freeloaders from signing up! Good idea, bad idea? Who's to say. Is it awesome: absolutely.

Check out our other video on generated columns:    • Faster database indexes (straight from the...  

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00:00 Infinite email addresses
01:18 Users table example
01:58 How to prevent it
03:00 Coming up with the formula
04:45 The generated column
06:23 Enforcing uniqueness
07:41 Is this a good idea?
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