official doc

MongoDB CRUD Commands

1. Create (Insert Data)

• Insert a single document:

• Insert multiple documents:

2. Read (Query Data)

• Find all documents:

• Find documents with a condition:

• Find a single document:

• Retrieve specific fields (projection):

3. Update (Modify Data)

• Update a single document:

• Update multiple documents:

• Replace an entire document:

4. Delete (Remove Data)

• Delete a single document:

• Delete multiple documents:

• Delete all documents in a collection:

5. Other Useful Commands

• Count documents:

• Sort results:

• Limit results:

• Skip documents:

• Create an index for faster queries:

• Drop (delete) a collection:

• Drop a database:

MongoDB Advanced Commands

1. Database Management

• Show all databases:

• Use (switch to) a database:

• Show collections in the current database:

• Drop a database:

2. Collection Management

• Create a new collection explicitly:

• Drop (delete) a collection:

• Check collection stats:

3. Aggregation Operations

• Basic aggregation example:

• Count the number of documents in a collection:

• Find the average age:

4. Indexing for Performance Optimization

• Create an index on a field:

• Create a compound index on multiple fields:

• List all indexes on a collection:

• Drop an index:

5. Bulk Operations

• Bulk insert multiple documents:

• Bulk update multiple documents:

• Bulk delete multiple documents:

6. Find Queries with Advanced Filters

• Find documents where age is between 25 and 35:

• Find documents where city is either "New York" or "Los Angeles":

• Find documents where city is NOT "Chicago":

• Find documents where the "tags" array contains "sports":

• Find documents where "tags" array contains BOTH "sports" and "movies":

7. Working with Embedded Documents & Arrays

• Find documents with a specific nested field value:

• Update a field inside an embedded document:

• Add an element to an array field:

• Remove an element from an array:

• Update specific array elements based on condition:

8. User & Role Management

• Create a new user:

• Show all users:

• Delete a user:

9. Backup & Restore

• Backup a database:

• Restore a database from a backup:

10. Replication & Sharding (Basic Commands)

• Check replication status:

• Initiate a new replica set:

• Add a secondary node to the replica set:

• Check shard status: