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

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.

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.

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.

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

DIY with Examples and Sample Code

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