There is no maximum limit for storing data, but it will be limited by disk space. For queries with more data, it is best to establish an index.

Mongo DB is a very popular non-relational database (NoSql) in IT field at present, and its flexible data storage method is favored by current IT practitioners. Mongo DB realizes the idea of object-oriented (OO idea) very well, and every record in Mongo DB is a document object. The biggest advantage of Mongo DB is that all data persistence operations can be easily realized by directly calling methods, and developers do not need to manually write SQL statements.