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Showing posts with label MongoDB. Show all posts
Showing posts with label MongoDB. Show all posts

MongoException$DuplicateKey: E11000 duplicate key error index - @Version

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Obviously, we get this exception when we try to update/insert a document(record) with duplicate key field in MongoDB collection(table). Ther...

Spring MongoDB _id field mapping conventions

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Java Spring MongoDB  : '_id' field mapping : MongoDB requires that you have an '_id' field for all documents. If you don...

MongoDB Multiple insert at once

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We can insert multiple documents (bulk insert) to a collection using a single insert command : Syntax :    db.[COLLECTION].insert( [ { D...

MongoDB rename a database

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As of now, there is not a straight forward way to rename a MongoDB database. But you can use the following steps to achieve so : Here, we ...

MongoDB Drop Database

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We can use the following query to drop ( DELETE EVERYTHING) from a MongoDB database ( please be careful on running the query, it deletes e...

MongoDB Like Query

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We can do the following to achieve SQL's LIKE equivalent on a Query : MongoDB :  db.users.find({"name": /jo/}) MYSQL Equi...

MongoDB - show all database in server

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We can use following commands to view all databases in the server    show dbs OR     show databases

MongoDB - List all collection from selected DB

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There are two ways to do so, so far : 1 ) using  reference variable 'db'      db.getCollectionNames() 2) using show command  ...

MongoDB : use database / switch to different database

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MongoDB uses same syntax as SQL/MySQL to switch to different database : MongoDB Syntax :     use DATABASE_NAME SQL Syntax :      use D...