SQL (Structured Query Language)

SQL (Structured Query Language) is a programming language used to manage and manipulate data stored in relational database management systems (RDBMS). It allows users to create, update, delete, and retrieve data from the database.

SQL is made up of a variety of commands, including:

• SELECT - used to retrieve data from the database
• INSERT - used to add new data to the database
• UPDATE - used to modify existing data in the database
• DELETE - used to delete data from the database
• CREATE - used to create new database objects, such as tables and indexes
• DROP - used to delete database objects

These commands can be used in combination with various clauses and conditions to perform more complex queries and tasks. For example, a SELECT statement can be used to retrieve specific columns from a table, or to filter the results by a certain criteria.

SQL is an essential tool for managing and working with data in a database, and is widely used in various industries including finance, healthcare, and technology.

What is SQL used for

• Creating tables to store data
• Inserting data into tables
• Updating or deleting data from tables
• Retrieving data from tables
• Joining data from multiple tables