Introduction

Today is the time of data and almost every type of business uses data to run its operations. The core part of many web applications and mobile apps is also data and to manage this data, a database is needed. That is, in whichever field a significant amount of data is involved, a database is used.

Whether it is a finance industry or music applications like Spotify, or social media platforms like Instagram, all use databases. And to run these databases, the programming language that is required is called SQL. And the relationship between SQL and database is such that where database, there is SQL.

Despite being older than many languages, SQL is the most implemented database language because it is so common, it can be very amazing for all of them to know about it, who are interested in computer programming or are planning to take a step in this programming world.

You can know as much as possible about SQL and your knowledge related to programming languages can increase even more, which is profitable for you.

What is SQL?

So let’s start. and know everything about SQL that is important for you to know. The full form of SQL is Structured Query Language. It is pronounced this way, S-Q-L, and it is a standard programming language for relational databases.

Yes, but it is not a language like Java and C++. Java and C++ are third-generation languages, so SQL is a fourth-generation language. Instead of being a programming language that builds websites, applications and software, SQL is such a language that is capable of storing, retrieving and manipulating data in databases.

Its use can be done in sharing and managing data. And especially, such data that is present in the relational database management system. By using SQL, you can update and recognize data queries apart from this, the schema or structure of the database system create and modify, but can also control data access. How powerful is this?

You will come to know from this that a spreadsheet like Microsoft Excel can compile a lot of information. But in SQL, more data can be compiled and managed than that. And SQL databases can handle millions and billions of data sales. Yes, absolutely. By using SQL, you can store the data of every client of your business. In which you can keep all the details from contacts to sales.

If needed, you can instantly get information from the SQL database. SQL was first developed by IBM researchers Raymond Boyes and Donald Chamberlain in 1970. And from the beginning it was called SEQUEL. In 1986, the American National Standards Institute and the International Organization for Standardization adopted the standard definition of SQL.

Common Elements of SQL

Now let’s know about the common elements of SQL language.

• Keywords – These are the words that are used to perform different operations in the database. Like Add, Join, View, etc.
• Identifiers – In the database, the names of the objects are called identifiers such as tables, index, views, columns, etc.
• Expressions – A string of symbols or symbols performing mathematical operations on data is called expressions.
• Search Conditions – This is an element used to select a subset of the rows from the table. And its use is also to specify true and false conditions in a row.
• Data Types – This is the type of data that is stored in each column when creating a table. Data types include number, string, date and time etc.
• Nulls – Its use is to specify that the value is unknown or missing.
• Comments – These explain sections of SQL statements.

Common SQL Commands

After SQL common elements, now let’s know about the most commonly used SQL commands.

• Create database – This command is to create a database.
• Create table – To create tables
• Select – To find or extract some data from the database
• Update – This command is used to adjust and edit data
• Delete – To delete some data
• Drop – To remove tables and databases
• Insert into – This command is used to insert new data into the database

So when such commands are entered in the database system, then the system interprets the commands and processes them. And in the form of the result, either a new record can be created in the database or a new database can be created.

Career Opportunities with SQL Skills

By the way, you know that if you have SQL skills, then what positions can you work in? Let us tell you. After mastering SQL skills, you can reach positions like database administrator i.e. DBA, database migration engineer, data scientist, Big Data Architect, Data Analyst, Business Intelligence Analyst and Software Engineer.

Popular SQL Database Systems

Now you should know about some such popular SQL database systems that make the life of a database programmer very easy. You should also know that the database system allows a program developer to work on databases with the help of a user interface. And with the help of ready templates, builders and constructors available in database systems, it becomes quite easy to work for database programmers.

Such SQL database systems are:

1. Oracle Database – This is the world’s leading SQL database system that is used in many industries. But it is more popular in data warehousing and online transaction processing.
2. MySQL – This open-source database system is available for both individuals and businesses for free. And it is used in many open-source software programs and applications. Here it will also be beneficial to know that SQL is a language and MySQL is a database system. These two work together but are completely different. That is, you will use SQL to update and manipulate stored data in a MySQL database.
3. Microsoft SQL Server – Its use is done on web servers running on Windows as well as consumer software. And it has a very large user base.
4. PostgreSQL – Just like MySQL, it is also a free open-source database system that supports macOS, Windows and Linux operating systems.
5. NoSQL – NoSQL refers to a kind of non-relational database. i.e. it does not use the schema of the rows and columns found in most traditional database systems.

Learning SQL

After knowing so much about SQL, if you are thinking that it can be tough to learn, then you may be surprised to know that this language is more straightforward in comparison to other more complex programming languages and it can be easier for beginners to learn it instead of starting with Java, C++, PHP or C#.

That’s why if you see a career scope in this language, then you can start this learning very easily with the help of online resources. You can also get deep knowledge of this language in many colleges and universities. If you want, you can also start practicing by installing a free version of a database. You can start with basic queries and try to write queries yourself through free tutorials and books. You can also clear your doubts by asking questions on SQL platforms and by practicing this way by using the right resources, you can learn SQL.

Conclusion

SQL, or Structured Query Language, is much important for managing data in different industries like finance, music, and social media. It’s like the language of databases. With SQL, you can store, find, and change data easily.

It’s can used in jobs like database administration and software engineering. Learning SQL isn’t too hard, even for beginners. There are few popular database systems available like Oracle, MySQL, and Microsoft SQL Server that use SQL. Learning SQL can lead to many job opportunities. You can learn SQL online, in books, or through practice. It’s a valuable skill for anyone interested in computers and technology.