The SQL programming language is used in retail, healthcare, banking, education, telecommunications, and even defense. Developed in the 1970s, it spread rapidly and today is the most widely used language in database industries . Therefore, learning the SQL programming language will open the doors to great job opportunities.
What is the SQL language?
The Structured Query Language (SQL) is a manager language for managing information in relational databases . This type of programming language allows you to communicate with the database and perform access and manipulation operations on the stored information.
The SQL programming language not only allows data selection, insertion, update and deletion operations, but also administrative operations on databases. Therefore, it is a complete database language that goes beyond information retrieval .
SQL is used to control all the functions that a database management system offers to its users, also providing a framework to create the database itself, manage its security, update its contents, retrieve the data and share it among different users. .
In fact, most relational database management systems use the SQL programming language to interact with the database . Oracle is one of the most popular and used database management tools, but there are also Microsoft SQL, MySQL and Access, among others.
What are the main features of the SQL programming language?
Designed to manage and retrieve information from relational database management systems, the SQL programming language is characterized by the use of algebra and relational calculus to perform queries . However, what has made it popular and consolidated is:
- Standardized language. Standardized in 1986, the SQL programming language allows deploying implementations of it in different systems, using practically the same code for all of them. For example, the Oracle SQL language is not identical to that of Microsoft SQL Server, but the differences are minimal, a great advantage because the commands for creating the database structure or manipulating the information share the same form.
- Data integrity. SQL has the function of preserving the integrity of the data, ensuring that it is valid, correct and complete. It also protects the database from corruption caused by system failures or inconsistent updates.
- One of the main reasons for the success of the SQL programming language is its flexibility. It is a very versatile language when it comes to implementing solutions and allows defining different ways of viewing the data to meet the specific demands of users.
- Simplicity and clarity. SQL is a unified, clear and easy to understand language. Its structure includes a high level of English, so that the SQL sentences are easy to understand and learn.
Today, an expert in SQL programming is key for all companies that have databases . In fact, professionals such as analysts, scientists and data engineers should be fluent in this language, as well as back-end or mobile application developers since these projects are also often powered by SQL.
With our University Course in SQL you can specialize in this programming language . Thanks to this online SQL programming course you will learn to design and build relational databases at your own pace.