MongoDB

MongoDB is a document based No-SQL database. MongoDB stores all schema and records using a JSON-like syntax and makes use of collections and documents.

This competency area includes inserting and sorting records, limiting query results, counting and aggregating documents, among others. 

Key Competencies:

1. Bulk insert multiple documents at once - Inserting multiple records at once in a collection.

2. Sort multiple documents - Sorting documents in ascending order.

3. Limit query results - ​Limiting the results of a query based on a given criteria using the limit() function.

4. Count documents - ​Counting the number of documents in a collection.

5. Iterate query results - ​Iterating over documents returned from a query.

6. Aggregate multiple documents - ​Grouping values from multiple documents together.