Why is SQL important? What problem is it solving?

Database administration or data management is incomplete without the SQL. For comfortable use of  SQL as part of your administration or development requires that you understand the basics of SQL, which will take you a long way in your career.

Before we start with the introduction to the SQL itself, and then, understand the important features of SQL Server. It will take you through a demonstration of the internal workings of SQL, starting from SQL standards, evolution, and progresses to creating tables, understanding and defining relationships, writing Transact‑SQL commands, and so on.

You will also understand that SQL is a special-purpose programming language; special-purpose, as in, it is different from the general-purpose programming languages such as C, C++, Java/JavaScript, etc., meaning, it has a very particular purpose: manipulation of datasets. And this manipulation happens using what is known as Relational Calculus.

But isn’t studying SQL alone, restrictive? Turns out, it isn’t. Of course, we can use SQL on any kind of database or data source, but even if we cannot directly use SQL, most query languages of today have some relationship to SQL. In general, once you know SQL, you can effortlessly pick up other query languages too.

Standards are vital because every relational database must build its framework around this framework in order to ensure compatibility. This means that the learning curve is greatly reduced. SQL is ANSI as well as ISO-compliant, along with other standards, which emphasizes the fact that you have to learn the concept only once.