Table Management 🏗️¶
Mentor's Note: Tables are the skeleton of your database. If the skeleton is weak, the whole app will fail. This module teaches you how to build and renovate these structures professionally. 💡
🏗️ What you will learn:¶
- CREATE TABLE: Building columns and assigning data types.
- ALTER TABLE: Adding new features to an existing structure.
- DROP vs TRUNCATE: Knowing when to delete the structure vs just emptying it.
- TEMP Tables: Using scratchpads for complex data processing.
🎨 Visual Logic: The Skeleton¶
classDiagram
class EMPLOYEES {
+INT emp_id (PK)
+VARCHAR name
+DECIMAL salary
+INT dept_id (FK)
}