SQL Joins: Predict the Output | Class 12 CS Quick Revision for CBSE 2026 скачать в хорошем качестве

SQL Joins: Predict the Output | Class 12 CS Quick Revision for CBSE 2026

Welcome back to the Class 12th Computer Science Quick Revision Course for the CBSE 2026 Board Exams! 🚀 In the previous video, we mastered the art of writing queries. But in the Board Exam, writing the query is only half the battle. The other half? "Predict the Output" questions based on SQL Joins. 🎯 Goal: To mentally execute SQL queries like a compiler and generate the exact output table without a single error. These questions test your attention to detail—specifically how rows are matched and how columns are counted. In this video, we solve Previous Year Questions (PYQs) from 2022-23 and 2021-22 to simulate the real exam environment: ✅ Natural Join vs. Equi-Join: Understanding the critical difference in how columns are eliminated (or kept) in the final output. ✅ Tracing the Logic: How to manually match Primary Keys and Foreign Keys on paper (Loan/Borrower & Doctor/Patient examples). ✅ Aggregate Functions: Solving mixed queries that combine MAX, MIN, and COUNT with Joins. ✅ Grouping & Filtering: Handling GROUP BY and HAVING clauses when data is spread across two tables. ✅ Row Selection: Why some rows (like Doctors with low fees) disappear from the output completely. 📚 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: Now that we have completely conquered SQL—both writing queries and predicting outputs—we are ready to bridge the gap. In the next video, we start Unit 3: Python-MySQL Connectivity to learn how to control our database using Python scripts! 👉 Watch here:    • Python MySQL Connectivity Explained | Clas...   Make sure to subscribe and hit the bell icon so you don't miss a lecture! ⏱️ Timestamps: 00:00 - Introduction: The "Predict the Output" Challenge 00:36 - PYQ Set 1: Natural Join Logic (Loan & Borrower - CBSE 2023) 02:38 - PYQ Set 2: Aggregates, Group By & Joins (Computer & Sales - CBSE 2023) 08:49 - PYQ Set 3: Equi-Join vs. Natural Join & Filtering (Doctor & Patient - CBSE 2022) 15:20 - Summary: Key Differences & Exam Tips #cbse2026 #class12computerscience #sqloutput #sqljoins #naturaljoin #cbsepyq #class12cs #boardexam2026 #quickrevision #computerscience