Are NoSQL databases schema less?

Question

As a NoSQL database, MongoDB is considered schemaless because it does not require a rigid, pre-defined schema like a relational database. The database management system (DBMS) enforces a partial schema as data is written, explicitly listing collections and indexes.

Do NoSQL databases have schema?

NoSQL databases do not have a schema in the same rigid way that relational databases have a schema. Each of the four main types of NoSQL database has an underlying structure that is used to store the data.

What are the disadvantages of NoSQL databases?

Disadvantages of NoSQL databasesNot all NoSQL databases contemplate the atomicity of instructions and the integrity of the data. They withstand what's know as eventual consistence.Compatibility issues with SQL instructions. ... Lack of standarization. ... Cross-platform support. ... Poor usability.

What are 3 common characteristics of NoSQL databases?

The three main features of NoSQL databases are scale-out, replication, and flexible data structure (Fig. 1).

Does MongoDB have schema?

Data in MongoDB has a flexible schema. Collections do not enforce document structure by default. This flexibility gives you data-modeling choices to match your application and its performance requirements.

Expert · Answer