SQL Data Types Explained | Day 4 SQL for Beginners (Char, Varchar, Number, Date, CLOB, BLOB)

Описание: Welcome to Day 4 of our SQL Learning Series! 🚀
In this session, we dive into SQL Data Types – the foundation of how data is stored, validated, and managed in relational databases.

🔑 What you’ll learn today:

Why Data Types are Important – validation & memory allocation.

CHAR vs VARCHAR/VARCHAR2 – fixed vs variable length with examples.

NUMBER Data Type – precision, scale, and real-world use cases.

DATE Data Type – storing dates in SQL.

Large Objects (LOBs) – handling large text (CLOB) & media files (BLOB).

📘 Covered in this tutorial:

Syntax & usage with real examples

Industry use cases (e.g., country codes, phone numbers, amounts with decimals, storing images/files)

Interview tips: Difference between CHAR and VARCHAR, Precision vs Scale

👉 Assignment for You:
Explain the difference between CHAR and VARCHAR2 with a practical example.

Notes: https://animated-basin-ea1.notion.sit...