Big Data and AI

  In this comprehensive set of appendices, you’ll find four indispensable resources to accelerate your SQL mastery: Appendix A: SQL Syntax Cheat Sheet Appendix B: Glossary of Terms Appendix C: Sample Database Schema Walkthrough Appendix D: Recommended Resources Use these sections as quick look-ups during development, interview prep, or exam revision. They’re designed to be your go-to reference long after you complete the main tutorial series. Appendix A: SQL Syntax Cheat Sheet This cheat sheet condenses core SQL commands, clauses, and patterns into organized tables and examples. Keep it on your screen or print it as a one-page PDF for rapid lookup. 1. Data Definition Language (DDL) Command Syntax & Example Purpose CREATE TABLE CREATE TABLE table_name (col1 INT PRIMARY KEY, col2 TEXT); Define new tables ALTER TABLE ALTER TABLE table_name ADD COLUMN col3 DATE; Modify existing tables DROP TABLE DROP TABLE IF EXISTS table_name; Remove tables permanently TRUNCATE TABLE TRUNCATE TABL...