Structured Query Language (SQL), also known as SEQUEL, is the most widely used standard language for working with databases. It is a domain-specific language that is mostly used to perform a variety of tasks such as creating a database, storing data in the form of tables, modifying, extracting data, and so on. SQL comes in a variety of flavours, including MYSQL, PostgreSQL, Oracle, SQL Lite, and others.

SQL became the standard of the American National Standards Institute (ANSI) in 1986, and the International Organization for Standardization (ISO) the following year in 1987. (ISO). Today's world revolves around the Internet and technology. We are surrounded by massive amounts of data. So, in order to securely store and manage this data, we need a proper database, and in order to manage a database, we need a language, which is SQL. It has a wide range of applications and is used to maintain and manipulate data by business professionals, developers, and data scientists. According to the most recent 2020-21 statistics, SQL is still one of the most widely used languages in the world.

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Uses of SQL Programming

Now we'll look at how SQL can be used dynamically:

1. Relational Database

Before we can understand Relational Database, we must first understand the Relational Model, abbreviated as RM. Database RM is simply storing and managing data in a structured and specific manner. Scientist Edgar F. Codd described it for the first time in 1969. In RM, data is stored in the form of rows known as "tuples," which are then grouped into relations. RM aids in the storage of data in a descriptive and concise manner, making it easier to retrieve and manipulate data with simple queries. So, in 1970, Code released a piece of software known as the Relational Database Management System (RDBMS), which is used to maintain RM using SQL. SQL is useful for querying and maintaining data in RDBMSs. This is one of the most important applications of SQL; it instructs RDBMS to perform specific tasks in the form of queries.

2. Using SQL to Perform All Basic Database Operations

SQL allows us to perform a plethora of commands that allow us to perform various operations in a database.

3. Database 

Transaction Control: SQL is also used to keep track of the transactions that occur in databases. It entails adhering to basic rules in order to keep the database consistent. These are known as ACID properties. The most commonly used control commands are COMMIT, ROLLBACK, and so on.

4. SQL UNION

The union operator in Relational Algebra is used to combine two sets into a single set with distinct values. Similarly, SQL UNION aids in producing a single result from two separate SELECT statements. The UNION of two tables returns distinct attributes (columns) from both tables.

5. SQL JOIN

The SQL JOIN statement allows you to retrieve information by joining two or more tables. JOIN is commonly used because a database may contain two or more tables. For example, there are two tables: "Customer," which contains customer information, and "Product," which contains product information.