The difference and use scene of relational database non-relational database __ Database

Advantages of non-relational databases:
1, performance
NoSQL is based on key-value pairs, can be imagined as a table of the primary key and value of the corresponding relationship, and do not need to go through the SQL layer parsing, so the performance is very high
2, scalability
It is also because of the lack of coupling between data based on key-value pairs, so it is very easy to scale horizontally.
3, the use of the scene: Log, buried point, forum, blog and so on

Advantages of relational databases:
1. Complex query
You can use SQL statements to easily make very complex data queries between a table and multiple tables
2. Transaction support
This makes the data access requirements for high security performance possible.
3, the use of the scene: all the logical relationship of data storage