SQL

What is SQL?

Understand the fundamentals of SQL, databases, and RDBMS.

By TechCoder TeamLast updated: 2026-06-02
In a Nutshell

Understand the fundamentals of SQL, databases, and RDBMS. This hands-on tutorial focuses on practical implementation of what is sql? concepts.

What is SQL?

SQL (Structured Query Language) is the standard programming language for managing and manipulating relational databases. It allows you to store, retrieve, update, and delete data with ease.

What is a Database?

A database is an organized collection of data, generally stored and accessed electronically from a computer system. Think of it as a digital filing cabinet.

DBMS vs. RDBMS

  • DBMS (Database Management System): Software used to manage databases (e.g., SQLite file manager).
  • RDBMS (Relational Database Management System): A type of DBMS based on the relational model, where data is stored in tables with rows and columns (e.g., MySQL, PostgreSQL, Oracle).

Why learn SQL?

  1. Universal Standard: Used by almost every tech company.
  2. Data Analysis: Essential for extracting insights from data.
  3. Backend Development: core skill for building server-side applications.

Real-world Applications

  • Banking: Storing transaction records securely.
  • Social Media: Managing user profiles, posts, and connections.
  • E-commerce: Tracking inventory, orders, and customer data.