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MongoDB.pptx

  1. 1. MongoDB Developed and managed by MongoDB.Inc Aayush Chimaniya Divergent Software Labs Pvt. Ltd. Indore
  2. 2. Topics -What Is MongoDB -Why Use MongoDB -When To Use MongoDB -How MongoDB is different from RDBMS -How It Works -How To Use MongoDB -Pros & Cons Of MongoDB
  3. 3. What is MongoDB • MongoDB is an open-source document-oriented database. • It is designed to store a large scale of data. • It also allows you to work with data very efficiently. • It is categorized under the NoSQL (Not only SQL) database because the storage and retrieval of data are not in the form of tables. How it works ?
  4. 4. Why Use MongoDB? How it works ? • MongoDB is built on a scale-out architecture that has become popular with developers of all kinds for developing scalable applications with evolving data schemas. • As a document database, MongoDB makes it easy for developers to store structured or unstructured data. • It uses a JSON-like format to store documents. This format directly maps to native objects in most modern programming languages, • It can also handle high volume and can scale both vertically or horizontally to accommodate large data loads.
  5. 5. When To Use MongoDB? How it works ? • Storing large volumes of data without structure. • NoSQL databases like are a good choice when your data is document- centric and doesn’t fit well into the schema of a relational database,
  6. 6. How mongoDB is different from RDBMS MongoDB. RDBMS. It is a non-relational and document-oriented database. It is a relational database. It is suitable for hierarchical data storage. It is not suitable for hierarchical data storage. It has a dynamic schema. It has a predefined schema. In terms of performance, it is much faster than RDBMS. In terms of performance, it is slower than MongoDB.
  7. 7. How it works ? • Now, we will see how actually thing happens behind the scene. • As we know that MongoDB is a database server , and the data is stored in these databases. • Because of its NoSQL database, the data is stored in the collections and documents. the database, collection, and documents are related to each other as shown below:
  8. 8. • Collections just like the MYSQL database tables. You are allowed to create multiple databases and multiple collections. • Now inside of the collection we have Documents. These documents contain the data we want to store in the database & a single collection can contain multiple documents & schema-less means it is not necessary that one document is similar to another. • The documents are created using the fields. Fields are key-value pairs in the documents, it is just like columns in the relation database. The value of the fields can be of any BSON data types like double, string, boolean, etc. • Here, BSON stands for Binary representation of JSON documents. • Or we can Say the MongoDB server converts the JSON data into a binary form that is known as BSON • Why BSON-: • MongoDB uses BSON to offer powerful indexing and querying features • JSON has a specific set of data types—string, boolean, number for numeric data types, array, object, and null. Unlike JSON, BSON offers additional data types such as bindata for binary data, decimal128 for numeric.
  9. 9. How it works ?
  10. 10. How To Use MongoDB How it works ? 1. To Use Mongo DB With MongoShell 2. To Use Mongo DB With Spring Boot Application
  11. 11. How it works ? 1. To Use Mongo DB With MongoShell
  12. 12. How it works ?
  13. 13. To Use MongoDB With Spring Boot Application MongoRepository -: MongoRepository is an interface provided by Spring Data in the package org.springframework.data.mongodb.repository. MongoRepository extends the PagingAndSortingRepository and QueryByExampleExecutor interfaces that further extend the CrudRepository interface. MongoRepository provides all the necessary methods which help to create a CRUD application and it also supports the custom derived query methods. Dependency Required-: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency>
  14. 14. Pros & Cons Of MongoDB How it works ? • Pros of MongoDB : • It is a schema-less NoSQL database. You need not to design the schema of the database when you are working with MongoDB. • It does not support join operation. • It provides great flexibility to the fields in the documents. • It contains heterogeneous data. • It provides high performance, availability, scalability. • It is a document oriented database and the data is stored in BSON documents. • Cons of MongoDB : • It uses high memory for data storage. • It doesn’t support mapping between data. • You are not allowed to store more than 16MB data in the documents. • The nesting of data in BSON is also limited you are not allowed to nest data more than 100 levels.

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