Mongodb Cheatsheet

MongoDB Shell (mongosh) is the command-line interface for interacting with MongoDB. It provides a JavaScript interface for database operations, administration, and exploration.

MongoDB shell provides commands to manage databases including creation, deletion, and maintenance operations. Databases in MongoDB are created implicitly when you first store data in them.

Collections in MongoDB are containers for documents, similar to tables in relational databases. The MongoDB shell provides commands to create, manage, and inspect collections. Collections are created implicitly when you first insert a document, but can also be created explicitly with specific options.

CRUD operations (Create, Read, Update, Delete) are the fundamental operations for working with MongoDB documents. The MongoDB shell provides methods to insert, query, update, and delete documents within collections.

MongoDB query operators allow you to construct expressive queries to filter documents based on specific conditions. They can be used within find(), update(), and aggregation operations to match documents based on comparison, logical, element, evaluation, array, and other criteria.

Update operators in MongoDB modify document fields, array elements, or perform complex transformations. They're used with update methods like updateOne(), updateMany(), and findAndModify() to specify the changes to apply to matching documents.

In MongoDB, a cursor is a pointer to the result set of a query. Cursors allow you to iterate through query results efficiently, especially for large result sets. The MongoDB shell provides various methods to manipulate and control cursors for optimizing data retrieval.

The MongoDB Aggregation Framework processes data records and returns computed results. It uses a pipeline concept where documents pass through multiple stages that transform them into aggregated results.

Indexes in MongoDB improve query performance by creating efficient paths to data. They support various query types including equality matches, ranges, sorting, and geospatial queries, but require additional storage space and can impact write performance.

MongoDB Shell provides commands for database administration tasks like monitoring server status, managing users and roles, configuring replication and sharding, and tuning database performance.

MongoDB provides various tools and commands to analyze and optimize query performance. These include explain plans, database profiling, and various monitoring commands to identify bottlenecks and improve database efficiency.

MongoDB Shell provides methods to import and export data in various formats. For more complex operations, MongoDB also offers dedicated tools like mongoimport, mongoexport, mongodump, and mongorestore that can be called from the shell.

MongoDB Shell is a JavaScript environment that allows you to write complex scripts to automate tasks, create custom functions, and implement advanced logic for database operations.

MongoDB Shell provides various helper functions to simplify common operations and enhance productivity. These include built-in functions for common tasks, as well as the ability to create custom helpers for specialized operations.

MongoDB Shell (mongosh) provides various configuration options to customize your experience. You can modify the appearance, behavior, and functionality of the shell to suit your workflow needs.