The original title is "Building and Querying a Database: A Practical SQL Guide"

Short summary

A practical SQL walkthrough showing how to build and query a PostgreSQL database for a fictional Greenwood Academy. Covers schema creation, table alterations, data insertion, and querying with filtering and CASE WHEN logic. Includes runnable code examples for DDL, DML, and DQL operations.

• •Step-by-step PostgreSQL schema creation with students, subjects, and exam_results tables
• •Demonstrates ALTER TABLE for adding, renaming, and dropping columns
• •Covers DML inserts and DQL queries with filtering and conditional logic

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