SQL ET POSTGRE 3.14 : data definition language/h1>

The Data Definition Language (LDD) is a set of rules and conventions used to describe the structure and characteristics of data stored in a database. In other words, the LDD is used to define the tables, fields, relationships and constraints that make up a database. SEO (Search Engine Optimization) is a digital marketing technique that aims to improve the visibility and ranking of a website in search engine results. To optimise the SEO of a website, it is important to structure the data well and to organise it in a logical and coherent way. The LDD therefore plays a crucial role in the SEO optimisation of a website. Indeed, a well-structured and well-defined database will allow search engines to easily understand the content of the site and to index the pages in a relevant way. In addition, the LDD makes it possible to define keywords and tags that can also contribute to improving the natural referencing of the site. In short, the data definition language is a key element in the SEO optimisation of a website. By using LDD best practices, it is possible to significantly improve the visibility and ranking of a site in search engine results.