DBMS: Relational Data Model & Keys | Quick Revision 2026 | Class 12 CS скачать в хорошем качестве

DBMS: Relational Data Model & Keys | Quick Revision 2026 | Class 12 CS

Welcome back to the Class 12th Computer Science Quick Revision Course for the CBSE 2026 Board Exams! 🚀 In this video, we continue with Unit 3: Database Management System (DBMS). Now that we have the blueprint, it's time to build the foundation. While SQL queries bring the heavy marks, the Relational Data Model and Keys are the favorite topics for the 2-3 mark theory questions and Viva voce. 🎯 Goal: To master the core terminology so you never get confused between 'Degree' and 'Cardinality' or 'Primary' and 'Foreign' keys in the exam. In this video, we cover: ✅ Database Fundamentals: Introduction to Database concepts and exactly why we need them over traditional file systems. ✅ The Relational Model: Decoding the technical terms—Relation (Table), Attribute (Column), Tuple (Row), and Domain. ✅ Structure Metrics: A clear guide to calculating Degree and Cardinality (A guaranteed question type!). ✅ Keys in Depth: Understanding the hierarchy of Keys: Candidate Key vs. Primary Key Alternate Key Foreign Key (and its role in linking tables). 📚 About this Course: This "Quick Revision Series" is designed for CBSE Class 12 Computer Science students who want to cover the entire syllabus efficiently. We focus on: • Concept Clarity in minutes. • Previous Year Questions (PYQs) integration. • Exam-oriented tips and tricks. 🎓 Don't miss a single topic! Access the full ALL-IN-ONE course here: 👉    • Zero to Hero: Class 12 Computer Science Cr...   🔔 Next Video: We will start the practical implementation with Introduction to SQL & MySQL Commands (DDL vs DML). 👉 Watch here: Make sure to subscribe and hit the bell icon so you don't miss a lecture! ⏱️ Timestamps: 00:00 - Brief recap of previous video & Introduction to the video 00:43 - Database Concepts & Need 02:20 - Limitations of File System 04:45 - Relational Data Model (Relation, Attribute, Tuple, Domain, Degree, Cardinality) 05:30 - Degree vs. Cardinality (Exam Tip) 06:59 - Keys: Candidate, Primary & Alternate 10:53 - Foreign Key Explained 12:24 - PYQ1 - CBSE 2024-25 14:39 - PYQ2 - CBSE 2024-25 Compartment Paper 15:38 - PYQ3 - CBSE 2022-23 (Alternate Key) 16:57 - PYQ4 - CBSE 2022-23 (2 marks) 19:11 - PYQ5 - CBSE 2022-23 Compartment Paper 19:57 - PYQ6 - CBSE 2021-22 (Attribute vs Domain) 20:53 - PYQ7 - CBSE 2021-22 (Candidate vs Primary Key) 21:26 - PYQ8 - CBSE 2021-22 (2 marks) 22:48 - PYQ9 - CBSE 2021-22 Compartment Paper 23:35 - PYQ10 - CBSE 2021-22 Compartment Paper (Primary Key) 25:22 - Summary & Next Topic #cbse2026 #class12computerscience #dbms #relationalmodel #primarykey #degreeandcardinality #quickrevision #boardexampreparation #class12cs #cbseboard