MongoDB related knowledge points

MongoDB is a product between relational databases and non-relational databases . It is the most feature-rich and most like
relational databases among non-relational databases . The data structure it supports is very loose and is a bson format similar to json, so it can store more complex data
types . The biggest feature of Mongo is that the query language it supports is very powerful. Its syntax is somewhat similar to an object-oriented query language. It can
implement most functions similar to single-table query in relational databases, and it also supports indexing of data. It is characterized by high performance , easy deployment,
easy use, and it is very convenient to store data .