Front-End Development Trends in 2025: What Every Developer Should Know
27 August 2025
Databases are essential in web development, acting as the storage system for websites and apps.
Two main types exist:
- Relational Databases (SQL) → Organize data in structured tables with relationships (MySQL, PostgreSQL).
- Non-Relational Databases (NoSQL) → Store flexible, unstructured data (MongoDB, Firebase).
Core concepts developers should know:
- CRUD Operations: Create, Read, Update, Delete.
- Queries: Retrieving and filtering data.
- Indexes: Speeding up lookups.
- Security: Protecting user data with encryption and access control.
For example, when you shop online:
- Products are stored in a database table.
- When you search, the system queries the database.
- The back-end sends results to the front-end for display.
Without databases, modern apps like Instagram, Amazon, and Netflix wouldn’t exist.