При работе с Node.js вы можете столкнуться с ситуацией, когда вы разрабатываете проект, который будет сохранять и запрашивать данные. В данном случае вам нужно будет выбрать решение для базы данных, которое будет отвечать характеристикам данных приложения и…
O Redis é um armazenamento de dados open-source de chave-valor na memória. Um dos seus recursos mais procurados é o suporte à replicação: qualquer servidor Redis pode replicar seus dados para qualquer número de réplicas, permitindo alta escalabilidade de…
Flask is a framework for building web applications using the Python language, and SQLite is a database engine that can be used with Python to store application data. In this tutorial, you’ll modify items in an application built using Flask and SQLite with a One-to-Many relationship.
Data management involves four fundamental types of database operations: operations that allow you to create, read, update, and delete data. Collectively, these operations are known as CRUD operations. This tutorial outlines how to create new MongoDB documents and later retrieve them to read their data. It also explains how to update the data within documents, as well as how to delete documents when they are no longer needed.
Uma versão anterior deste tutorial foi escrita por Melissa Anderson. O MongoDB, também conhecido como Mongo, é um banco de dados de documentos de código aberto usado em muitas…
Django est un framework web puissant qui peut vous aider à lancer votre application ou votre site web en Python. Django comprend un serveur de développement simplifié pour tester votre code en local, mais pour tout ce qui est lié, même légèrement, à la production, un serveur…
In certain Structured Query Language (SQL) statements, WHERE clauses can be used to limit what rows the given operation will affect. SQL allows users to retrieve granular result sets by providing a variety of different types of predicates, each of which use a specific operator to evaluate rows. This guide will outline two types of predicates and the operators they use: comparison operators and the IS NULL operator.
Like the other official MongoDB drivers, the Go driver is idiomatic to the Go programming language and provides an easy way to use MongoDB as the database solution for a Go program. In this tutorial you’ll get started with using the official MongoDB Go Driver. You’ll install the driver, connect to a MongoDB database, and perform several CRUD operations. In the process, you’ll create a task manager program for managing tasks through the command line.
Sharding is a strategy some users will implement to help them scale their database horizontally, with the hope being that the improved scalability will outweigh the added complexity. This guide outlines how sharding works in MongoDB, a popular, document-oriented, NoSQL database.
SQLite is a self-contained, file-based SQL database. SQLite comes bundled with Python and can be used in any of your Python applications without having to install any additional software. In this tutorial, we’ll go through the sqlite3 module in Python 3.
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