Classification of databases

What is a database

database ( DataBase , abbreviation DB )

• Concept : Data warehouse , Keep it in a computer for a long time , Organized , A collection of large amounts of data that can be shared , It's a number “ Warehouse ”
• effect : Save the data , And can be safe Management data ( Such as : Add, delete, change, check, etc ), Reduce redundant …

Database classification

Relational database ( SQL )

• MySQL , Oracle , SQL Server , SQLite , DB2 , …
• Relational database establishes the relationship between tables through foreign key Association

Non relational database ( NOSQL )

• Redis , MongoDB , …
• Non relational databases usually refer to data stored in the database as objects , The relationship between objects is determined by the Attribute to determine

What is? DBMS

Database management system ( DataBase Management System )
Database management software , Scientific organization and storage of data , Get and maintain data efficiently

Many applications operate databases through database management software .

INNODB The engine and MYISAM engine

INNODB engine （MySQL The default engine ）： High safety , Transaction processing , Multi table multi-user operation
MYISAM engine ： Save space , Faster