BDD

A short yet detailed introduction to understanding SOLID design principles.

A single SQL query that solved my Sudoku in seconds. You don't believe it right? Then come check it out. You will be amazed by power of SQL.

You’ve probably made some of these mistakes when you were starting your database design career. Maybe you’re still making them, or you’ll make some in the future. We can’t go back in time and help you undo your errors, but we can save you from some future (or present) headaches.

Quick and simple free tool to help you draw your database relationship diagrams and flow quickly using just keyboard

Writing a sqlite clone from scratch in C

A complete guide explaining every InfluxDB concepts in-depth and providing real-world applications of this new technology.

Mongo playground: a simple sandbox to test and share MongoDB queries

Les clés pour comprendre les bases de données. Découvrir, appréhender et s'initier aux bases de données simplement, sans avoir besoin d'être informaticien.

Web-based application for secure and efficient management of MySQL database servers

SQL is the language of data, and therefore the intermediary language for those who straddle the line between technology and business. Every business application needs a database and SQL is the key to working with these databases. Nick Harrison’s SQL Queries Succinctly will show you how to craft queries in SQL, from basic CRUD statements and slicing and dicing the data, to applying filters and using aggregate functions to summarize the data. You will look at solving common problems, navigating hierarchical data, and exploring the data dictionary.

Pour récupérer des données à partir d'une base de données, le langage SQL est utile. Il permet de récupérer "d'un coup" les données souhaités en réalisant notamment des liens entre les différentes tables de données.

Quick Database Diagrams (QuickDBD) is a simple online tool to quickly draw database diagrams by typing.

SQL JOIN Syntax and Differences, 3 tables

Structured Query Language (SQL) is an indispensable skill in the data science industry and generally speaking, learning this skill is…

Visiting a hospital or a clinic is never a pleasant situation. But it would be even worse if nothing was automated. Not so long time ago almost all documents were in a paper form. That not only polluted the environment but slowed down a process a lot. In some cases, patients should take care of their medical record as well wait in the hall that somebody calls for their name. Fortunately for us, the development of the technology also had a significant impact in this area. Today we’ll take a look at the data model we could use to run one such system.

Learn everything about SQL and its application for managing databases, from basic fundamental to core subject of database management.

DIY with Examples and Sample Code

A comparison of SQL and NoSQL, and a overview of common databases of each type

MySQL est un système de gestion de base de données (SGBD). Son rôle est d'enregistrer des informations dans de gigantesques tableaux (les tables) que l'on relie entre eux. On y communique en langage SQL, un langage qu'il est recommandé de connaître aujourd'hui.