Session 6 SQL Database Design SECRETS: Normalization, CHAR vs VARCHAR, SQL vs MySQL, Auto Increment скачать в хорошем качестве

Session 6 SQL Database Design SECRETS: Normalization, CHAR vs VARCHAR, SQL vs MySQL, Auto Increment

Many students can write SQL queries but still fail interviews because they don’t understand database design – normalization, denormalization, data types, and how real databases work. In Session 6 of my SQL Full Course, we fix that problem step by step with visual diagrams, examples, and interview‑style explanations. In this video, you will learn: Normalization – how to reduce redundancy, avoid anomalies, and design clean tables (1NF, 2NF, 3NF with examples). Denormalization – when it is okay to add redundancy for performance in data warehouses, reporting, and analytics systems. CHAR vs VARCHAR – fixed vs variable length storage, space usage, performance, and real‑time use cases like gender, PIN, names, and emails. SQL vs MySQL – why SQL is a language (standard) and MySQL is one specific RDBMS software that uses SQL. Auto Increment – how databases generate unique sequential IDs automatically for primary keys and why this is critical for real‑world tables. By the end of this session, you will be able to: Explain normalization and denormalization clearly in interviews with real‑time examples. Choose between CHAR and VARCHAR confidently based on data size, performance, and storage needs. Never confuse SQL (language) and MySQL (database server) again. Design tables with auto‑incrementing primary keys to avoid manual ID mistakes and ensure data integrity. This session is perfect for: Freshers preparing for SQL + DBMS interviews Aspiring data analysts, engineers, and backend developers Anyone following my SQL 100‑Questions Full Course from beginner to interview‑ready level ⏱️ Topics Covered: 0:00 Hook – Why database design decides your interview result 1:00 Normalization: concept, problems, and normalized tables 7:00 Normal forms (1NF, 2NF, 3NF) in simple language 10:00 Denormalization and performance trade‑offs 14:00 CHAR vs VARCHAR deep dive with practical examples 17:00 SQL vs MySQL explained with a simple analogy 19:00 Auto Increment and primary key design 21:00 Recap and what’s coming in Session 7 (Subqueries, GROUP BY, ORDER BY, LIMIT) If this helped you, don’t forget to Like, Subscribe, and comment “SESSION 7” so I can release the next part faster.