Relational Databases
Relational Databases are the software implementation of the concepts expressed by the theory introduced by the Relational Model.
Relational Databases are the software implementation of the concepts expressed by the theory introduced by the Relational Model.
In a Relational Database, data is stored in tables.
Each table contains one or more columns, that hold data of a specific type, like strings, numbers and so on.
The set of a table and all the rules about its columns is called a schema.
Each table can define constrains upon the data that each row can contain.
Tables can reference each other, forming relationships, using foreign keys.
A Database Management System is the software that implements the database in a computer system.
Commonly, relational databases use the SQL language to let us give instructions to create a database, define its tables schema, fill tables with data, and finally query the data when needed.
Some examples of software implementing relational databases are PostgreSQL, MySQL, SQLite, Oracle and MicroSoft SQL Server.
download all my books for free
- javascript handbook
- typescript handbook
- css handbook
- node.js handbook
- astro handbook
- html handbook
- next.js pages router handbook
- alpine.js handbook
- htmx handbook
- react handbook
- sql handbook
- git cheat sheet
- laravel handbook
- express handbook
- swift handbook
- go handbook
- php handbook
- python handbook
- cli handbook
- c handbook
subscribe to my newsletter to get them
Terms: by subscribing to the newsletter you agree the following terms and conditions and privacy policy. The aim of the newsletter is to keep you up to date about new tutorials, new book releases or courses organized by Flavio. If you wish to unsubscribe from the newsletter, you can click the unsubscribe link that's present at the bottom of each email, anytime. I will not communicate/spread/publish or otherwise give away your address. Your email address is the only personal information collected, and it's only collected for the primary purpose of keeping you informed through the newsletter. It's stored in a secure server based in the EU. You can contact Flavio by emailing [email protected]. These terms and conditions are governed by the laws in force in Italy and you unconditionally submit to the jurisdiction of the courts of Italy.