Top "Nosql" questions

NoSQL (sometimes expanded to "not only SQL") is a broad class of database management systems that differ from the classic model of the relational database management system (RDBMS) in some significant ways.

Transactions in NoSQL?

I'm looking into NoSQL for scaling alternatives to a database. What do I do if I want transaction-based things that …

transactions nosql
Possibility of duplicate Mongo ObjectId's being generated in two different collections?

Is it possible for the same exact Mongo ObjectId to be generated for a document in two different collections? I …

mongodb database nosql
Native JSON support in MYSQL 5.7 : what are the pros and cons of JSON data type in MYSQL?

In MySQL 5.7 a new data type for storing JSON data in MySQL tables has been added. It will obviously be …

mysql json database database-normalization nosql
MAX(), DISTINCT and group by in Cassandra

I am trying to remodel a SQL database Cassandra such that, I can find the Cassandra equivalent for the SQL …

nosql cassandra cql cql3 nosql-aggregation
SQL versus noSQL (speed)

When people are comparing SQL and noSQL, and concluding the upsides and downsides of each one, what I never hear …

sql nosql
How to get Schema of mongoose database which defined in another model

This is my folder structure: +-- express_example |---- app.js |---- models |-------- songs.js |-------- albums.js |---- …

javascript node.js mongodb mongoose nosql
How to make a query date in mongodb using pymongo?

I'm trying to perform a query date in mongodb, but the result is always empty. My query is as follows: //…

python mongodb pymongo nosql
MongoDB/NoSQL: Keeping Document Change History

A fairly common requirement in database applications is to track changes to one or more specific entities in a database. …

mongodb nosql
How to stop insertion of Duplicate documents in a mongodb collection

Let us have a MongoDB collection which has three docs.. db.collection.find() { _id:'...', user: 'A', title: 'Physics', …

mongodb mongodb-query database nosql
Query condition missed key schema element : Validation Error

I am trying to query dynamodb using the following code: const AWS = require('aws-sdk'); let dynamo = new AWS.DynamoDB.DocumentClient({ …

node.js amazon-web-services nosql amazon-dynamodb