Which data structure is used in MongoDB?

In MongoDB, data is stored as documents. These documents are stored in MongoDB in JSON (JavaScript Object Notation) format. JSON documents support embedded fields, so related data and lists of data can be stored with the document instead of an external table.

What are 2 possible techniques for modeling relationships in MongoDB?

Relationships can be modeled via Embedded and Referenced approaches. Such relationships can be either 1:1, 1:N, N:1 or N:N. Let us consider the case of storing addresses for users.

What is schema design MongoDB?

With MongoDB, you may embed related data in a single structure or document. These schema are generally known as “denormalized” models, and take advantage of MongoDB’s rich documents.

How do I create a database schema in MongoDB?

Considerations while designing Schema in MongoDB

1. Design your schema according to user requirements.
2. Combine objects into one document if you will use them together.
3. Duplicate the data (but limited) because disk space is cheap as compare to compute time.
4. Do joins while write, not on read.

What are the different ways to model tree structures with MongoDB?

Those approaches are:

• Model Tree Structures with Child References.
• Model Tree Structures with Parent References.
• Model Tree Structures with an Array of Ancestors.
• Model Tree Structures with Materialized Paths.
• Model Tree Structures with Nested Sets.

Which database is best for tree structure?

Unless you’re aiming at huge amounts of data I suggest you go with any of the SQL databases that you know best (MSSQL, MySQL, Oracle). But if your database will contain enormous number of hierarchy nodes then flirting with a specialised graph-oriented database may be a better option.

What is MongoDB architecture?

MongoDB is a document-oriented NoSQL database used for high volume data storage. Instead of using tables and rows as in the traditional relational databases, MongoDB makes use of collections and documents. Documents consist of key-value pairs which are the basic unit of data in MongoDB.

What is MongoDB document model?

MongoDB documents make it possible to embed document structures in a field or array within a document. These denormalized data models allow applications to retrieve and manipulate related data in a single database operation. For many use cases in MongoDB, the denormalized data model is optimal.

Which of the following considerations is most important when designing the schema for MongoDB?

When doing schema design in MongoDB there is more to consider than a blanket model for a “One-to-N” relationship model. We need to consider the size of “N” for our modeling because in this instance, size matters. One-to-one relationships can easily be handled with embedding a document inside another document.

Is MongoDB a hierarchy?

MongoDB allows various ways to use tree data structures to model large hierarchical or nested data relationships. Presents a data model that organizes documents in a tree-like structure by storing references to “parent” nodes and an array that stores all ancestors.