There is three default database in MongoDB. 1. local database used for storing metadata for that node where MongoDB installed, this DB will not be part of replication, 2. admin database used for authentication, authorization, and administrative purpose, 3. config database used for storing of metadata for sharding.
A collection in MongoDB is a group of documents. Collection is similar to Table in SQL relational database. Collection in MongoDB is a basic building block, which holds the same group of documents.
This is the Software Architecture tutorials index page. you can find different tutorial articles on software architecture here.
This is the Elastic search tutorial index page, where you can find all elastic search articles. Elastic is an open-source for search.
This article is about revoke privileges in MongoDB using db.revokePrivilegesFromRole and grant privileges in MongoDB using db.grantPrivilegesToRole.
How to migrate users from MONGODB-CR to SCRAM-SHA-1 , when you upgrade mongoDB from version less than or equal to 2.6 to higher. Step by step to migrate user to authenticate to new one.
How to connect MongoDB in Java using maven, eclipse is easy so learn connecting MongoDB in Java. connection using native MongoClient, mongoTemplate etc.
This article is about how to add user in MongoDB db.createUser(), db.dropUser(). Create user MongoDB will perform by userAdmin/dbAdmin role in MongoDB.
How to update data in MongoDB using mongo shell. Learn different update query in mongoDB, mongodb update example using mongo shell using db.collection.update() function.
How to export data in csv in MongoDB using mongoexport command. Learn utility for MongoDB export query result to csv using mongoexport utility. Its very easy and step by step process.