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MySQL enumerated data type enum

Description:

Select a value from the collection as data (radio)

MySQL manages enumerations through integers. The first value is 1, the second value is 2, and so on. Enumerated values store integer numbers in the database. Enumerations occupy two bytes in length and can write up to 65535 enumerated values.

Advantages of enumerations:

1. Restriction

two。 Save space

3. Fast running speed

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