Bei der Entwicklung einer Ruby-on-Rails-Anwendung stellen Sie möglicherweise fest, dass Sie Anwendungsaufgaben haben, die asynchron ausgeführt werden sollten. Die Verarbeitung von Daten, das Versenden von Batch-E-Mails oder die Interaktion mit…
Sistemas de gerenciamento de banco de dados relacionados são um componente fundamental de muitos sites e aplicativos. Eles fornecem uma maneira estruturada de armazenar, organizar e acessar informações. O PostgreSQLou Postgres é um sistema de…
In this tutorial you will connect a Python application to a database server using the MySQL connector. This module allows you to make queries on the database server from within your application. You’ll set up MariaDB for a Python environment on Ubuntu 18.04 and write a Python script that connects to and executes queries on MariaDB.
Une version précédente de ce tutoriel a été rédigée par Justin Ellingwood Redis est une base de données de valeurs-clés en mémoire renomée pour sa flexibilité, ses performances et son vaste…
In this guide, you will configure an active-active MariaDB Galera cluster. For demonstration purposes, you will configure and test three Debian 9 Droplets that will act as nodes in the cluster. MariaDB is an open source relational database system that is fully compatible with the popular MySQL RDBMS system. Galera is a database clustering solution that enables you to set up multi-master clusters using synchronous replication.
If you need to access your MySQL database from a remote location, it’s important that you do so securely. This guide will demonstrate how to configure MySQL on Ubuntu 18.04 to accept remote connections with SSL/TLS encryption.
Tables are the primary organizational structure in SQL databases. They consist of any number of columns, which reflect individual attributes of each row, or record, in the table. Being such a fundamental aspect of data organization, creating and managing tables are common tasks for anyone who builds or maintains databases. This guide outlines how to create tables in SQL, as well as how to modify and delete existing tables.
Like many computer languages, SQL allows the use of various wildcard characters. Wildcards are special placeholder characters that can represent one or more other characters or values. This is a convenient feature in SQL, as it allows you to search your database for your data without knowing the exact values held within it. This tutorial will go over how to query data using SQL’s designated wildcards.
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 comumente em…
Los sistemas de administración de bases de datos (DBMS) son programas que permiten a los usuarios interactuar con una base de datos. Les permiten controlar el acceso a una base de datos, escribir datos, ejecutar consultas y realizar otras tareas relacionadas con la…
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