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- 1. MEET MONGODB MongoDB is a document-oriented database. It is a NoSQL database, meaning it does not use a traditional relational database structure. MongoDB is schema-less, meaning that you do not need to define the structure of your data in advance. MongoDB is highly scalable and can be used to store large amounts of data.
- 2. MEET MONGODB MongoDB can manage Structured data Semi structured data Unstructured data NoSQL Databases No table No row No complex join
- 3. MEET MONGODB Advantages Schema less single object No complex joins Deep query-ability Tuning Ease of scale-out Uses internal memory for storing Where to Use MongoDB Big Data Content Management and Delivery Mobile and Social Infrastructure User Data Management Data Hub
- 5. EMBEDDED DATA MODEL In this model, you can have (embed) all the related data in a single document it is also known as de-normalized data model.
- 6. NORMALIZED DATA MODEL In this model, you can refer the sub documents in the original document.
- 7. DATATYPES
- 8. SAMPLE DOCUMENT _id is a 12 bytes hexadecimal number First 4 bytes = current timestamp Next 3 bytes = machine id Next 2 bytes = process id Last 3 bytes = incremental VALUE
- 9. MONGODB ATLAS MongoDB Atlas is a cloud-based database service That makes it easy to deploy, manage, and scale MongoDB databases Atlas is a fully managed service, so you don't need to worry about the underlying infrastructure Atlas is available on a variety of cloud providers, including AWS, Azure, and Google Cloud Platform
- 10. Download & Install MongoDB Community Server Download & Install MongoDB Compass Connect Compass With Server INSTALL MONGODB ENVIRONMENT
- 12. MONGODB Dedicated VS Code Extension
- 13. LOOK INSIDE MongoDB VS Code Extension
- 14. LETS START MongoDB Query Writing
- 15. DATABASE RELATED METHODS db.help() Common db objects. Displays method descriptions db.hostInfo() Returns a document record containing information about the operating system MongoDB is running on. db.getName() Returns the name of the current database. db.getMongo() Returns the name of the current database. db.currentOp() Reports the current in-progress operations.
- 16. DATABASE RELATED METHODS db.dropDatabase() Removes the current database. db.getCollectionInfos() Returns collection information for all collections in the current database. db.getCollectionNames() Lists all collections in the current database. db.getLastError() Checks and returns the status of the last operation db.getLastErrorObj() Returns the status document for the last operation.
- 17. DATABASE RELATED METHODS db.isMaster() Returns a document object containing a status report for the replica set. db.getReplicationInfo() Returns statistics for a replica set. db.listCommands() Displays a list of common database commands. db.logout() Terminates an authenticated session. db.printCollectionStats() Display statistics for each collection.
- 18. DATABASE RELATED METHODS db.serverBuildInfo() Returns a mongod documentation record containing the compile parameters for the instance. db.serverStatus() Returns a document that provides an overview of the state of the database process. db.shutdownServer() Cleanly and safely stops the current mongod or mongos process. db.stats() Returns a document record containing a report on the current database state. db.version() Returns the version number of the mongod instance:
- 19. DATABASE RELATED METHODS db.createCollection('demo') Returns a mongod documentation record containing the compile parameters for the instance. db.CollectionName.drop() It completely removes a collection from the database and does not leave any indexes associated with the dropped collections
- 20. INSERT QUERY The insertOne() method allows you to insert a single document into a collection.
- 21. INSERT QUERY The insertMany() allows you to insert multiple documents into a collection.
- 22. FIND QUERY The findOne() returns a single document from a collection that satisfies the specified condition. The find() method finds the documents that satisfy a specified condition and returns a cursor to the matching documents
- 23. PROJECTION In MongoDB, projection means selecting only the necessary data rather than selecting whole of the data of a document.
- 24. COMPARISON QUERY OPERATOR $eq: Equal To Operator $lt: Less Than Operator $lte: Less Than or Equal To Operator $gt: Greater Than Operator $gte: Greater Than or Equal To Operator $ne: Not Equal To Operator $in: In Operator $nin: Not In Operator
- 25. LOGICAL QUERY OPERATOR $and: Logical AND Opeartor $or: Logical OR Operator $not: Logical NOT operation $nor: Logical NOR operation
- 26. ELEMENT QUERY OPERATOR $exists: Matches documents that have the specified field. $type: Selects documents if a field is of the specified type.
- 28. EVALUATION QUERY OPERATOR $expr Allows use of aggregation expressions within the query language. $jsonSchema Validate documents against the given JSON Schema. $mod Performs a modulo operation on the value of a field and selects documents with a specified result. $regex Selects documents where values match a specified regular expression. $text Performs text search. $where Matches documents that satisfy a JavaScript expression.
- 31. SORT LIMIT DISTINCT & ROW COUNT
- 32. DELETE
- 33. UPDATE ONE & MANY
- 35. UNSET & RENAME
- 36. UPSERT Upsert is a combination of update and insert. Upsert performs two functions: Update data if there is a matching document. Insert a new document in case there is no document matches the query criteria.
- 37. MEET AGGREGATION Allow you to process multiple documents and return the results. To perform aggregation operations, use aggregation pipelines. An aggregation pipeline contains one or more stages that process the input documents.
- 38. SELECT , ROW COUNT IN AGGREGATION
- 39. SORT LIMIT IN AGGREGATION
- 40. SELECT FIRST 3 & LAST 3 AGGREGATION
- 41. CAMPARISON OPERATOR AGGREGATION $eq: Equal To Operator $lt: Less Than Operator $lte: Less Than or Equal To Operator $gt: Greater Than Operator $gte: Greater Than or Equal To Operator $ne: Not Equal To Operator $in: In Operator $nin: Not In Operator
- 42. LOGICAL OPERATOR AGGREGATION $and: Logical AND Opeartor $or: Logical OR Operator $not: Logical NOT operation $nor: Logical NOR operation
- 43. ELEMENT QUERY OPERATORS AGGREGATION $exists: Matches documents that have the specified field. $type: Selects documents if a field is of the specified type.
- 44. ELEMENT QUERY OPERATORS AGGREGATION