- Relational
- Nonrelational Database
- Hierachical Databases
- Network Databases
- Object-Oriented Databases

- UNSIGNED Data Attribute => forbid the use of negative numbers in this field

-key and Constraints => Enforce certain restrictions on your data.

	- Primary keys
	- Unique Keys
	- Foreign Keys
	- Index

- Adding fields on a table you can specify the position to First or After <other Field>


- ALTER TABLE *** ADD COLUMN <NAME> <DATATYPE> <ATTRIBUTES> <POSITION>

class that connects to the database and allows you to interact with it.

Not tied to MySQL only.