Learn MongoDB 3 and Rapidly Develop Scalable Applications

Insert documents into a collection and retrieve them with find, exploring single and batch inserts, ids, and basic query projections.

Learn to remove documents in MongoDB with collection.remove, control whether you delete a single or multiple matches, and compare removing items to dropping an entire collection.

Learn how to update documents in MongoDB 3 with the update command and the $set operator, and apply upsert and multi options, noting updates are atomic.

Learn how MongoDB's $inc increments existing fields or creates new ones, as shown with Joe's age and new siblings. Use upsert to insert a document when no match is found.

Learn how MongoDB 3 array operators modify arrays in place in the database, using $push and $each to add friends and $pull to remove them.

Explore the MongoDB $pop operator to remove array elements from the end or start, and use $unset to delete a field like the friend array from a document.

Explore querying and reading MongoDB using query selectors as a where clause to match documents in the pets collection and import sample data to practice using find.

Use the findOne command to return any document from a collection, revealing the document's structure and helping you work with MongoDB data in a dynamic schema.

Explore projections in MongoDB by using include or exclude field selectors to return a subset, improving performance; learn how IDs are handled and why you cannot mix inclusions and exclusions.

Explore query conditionals in MongoDB, using operators such as $lt, $lte, $gt, $gte, and $eq to filter by values, keys, or arrays, and combine for complex queries.

Master MongoDB query conditionals $in, $nin, and $or to filter pets by name or owner, combine multiple key conditions, and ensure correct bracket syntax.