Exploring NoSQL databases
To store non-structured and semi-structured data in an organized manner and perform CRUD operations, NoSQL database projects were started by the open source community. The main characteristic of NoSQL databases are flexibility the database schema, accepting different types of data insertion because the data will be organized at the time of the query. That is, these databases have the schema defined in the data query and not when the data is inserted into the database.
What is a NoSQL database?
NoSQL means Not Only SQL, thus it is a database that can accept standard SQL language statements but can also have other interfaces to perform operations on the database.
NoSQL databases are flexible and have multiple forms of operation, not just using the SQL language, based on the open source projects to specialize the database for some use cases.
You should know the different formats of NoSQL databases for the DP-900 certification, and this knowledge helps...