MongoDB Learning Notes-Understanding MongoDB

Learning Reference Address Http://www.runoob.com/mongodb

Nosql

The popular database is Oracle,sqlserver,mysql relational database, relative, and non-relational database, collectively referred to as NoSQL, and MongoDB is one of the NoSQL.

Characteristics of relational database:

-Highly organized structured data
-Structured Query Language (SQL) (SQL)
-Data and relationships are stored in separate tables.
-Data manipulation language, data definition language
-Strict consistency
-Basic services

Non-relational database features:

-represents more than just SQL
-No declarative query language
-No pre-defined pattern
-key-value pair storage, column storage, document storage, graphics database
-final consistency, not ACID properties
-Unstructured and unpredictable data
-Cap theorem
-High performance, high availability and scalability

As can be seen from the above, the relational database is more secure, rigorous, and non-relational database more pursuit of performance. The same conclusions can be drawn from the principles they follow.

Mongodb

About MongoDB:

Document-based database, written in C + +.

MongoDB Usage Scenarios:

1, massive data, often used for analysis, query.

2, the data is usually more fixed.

3, the data format is not fixed.

can also draw the above conclusions

MongoDB Learning Notes-Understanding MongoDB