The entity-relationship model (ER model) is the most widely used way of drawing the data in a problem before turning it into a database. Peter Chen proposed it in 1976 and it is still the first step in almost any database design: before thinking about tables or SQL,...
In this article, we will explore the main differences between relational and non-relational databases, their advantages and disadvantages, and in which situations it is more convenient to use one or the other. Databases are used in a wide range of applications, from...
Managing tables is a fundamental skill in any relational database. With SQL, you can efficiently create, modify, and manipulate tables to store and organize data. In this guide, you'll learn step by step how to create tables in SQL, add primary and foreign keys, and...
What are relational databases, and what are the best engines to use them? Databases are a way to store and organize information in a logical and orderly structure. There are different types of databases depending on the model they follow to represent the data and the...
Download the conversion table as a PDF (in Spanish). This resource is designed to help you convert from an Entity-Relationship Model to a Relational Model, explaining each of the relationships. Each tab explains the transformation of each relationship: Bold: Key Bold...
Relational database design is a fundamental process for organizing and structuring data in a way that supports efficient retrieval and management. Although it may seem challenging, especially for beginners, this process is crucial for storing and managing information...
Since their invention in the 1960s, the history of databases has been marked by continuous innovation. Databases have been fundamental to the evolution of computing and information management. This article explores their development, from the early solutions in the...
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