DBMS Module 4 Important Numericals & SQL Queries | Serializability + SQL Problems | BCS403 | VTU

Publicado em: 27 Junho 2026
no canal de: Express VTU 4 All

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Welcome to Express VTU 4 All!

In this lecture of Database Management System (DBMS) – BCS403 Module 4, we solve two important VTU examination questions covering Transaction Serializability and SQL Query Writing.

This video is specially designed for students preparing for Semester End Examinations (SEE) and Internal Assessments (CIE). Every question is solved step by step with simple explanations, making it easy to understand and write in the examination.

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📝 Questions Covered
Question 1

Determine if the following schedule is serializable and explain your reasoning.

(i) T1 : R(X) W(X) T2 : R(X) W(X) T1 : COMMIT T2 : COMMIT

(ii) T1 : W(X) R(Y) T2 : R(X) W(Y) T1 : COMMIT T2 : COMMIT

Question 2

Consider the following tables:

Sailors (sid : integer, sname : string, rating : integer, age : real)

Boats (bid : integer, bname : string, color : string)

Reserves (sid : integer, bid : integer, day : date)

Write SQL queries for the following:

Write CREATE TABLE statement for Reserves.
Find all information of sailors who have reserved boat number 101.
Find the names of sailors who have reserved at least one boat.
Find the names of sailors who have reserved a red boat.
Find the average age of sailors for each rating level.

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📖 Topics Covered

✔ Conflict Serializability

✔ Serializable Schedules

✔ Precedence Graph

✔ Transaction Scheduling

✔ Read-Write Conflicts

✔ Write-Write Conflicts

✔ SQL CREATE TABLE

✔ SQL SELECT Statement

✔ SQL JOIN Queries

✔ Aggregate Functions

✔ GROUP BY Clause

✔ SQL Query Writing

✔ VTU Important Numerical

✔ Previous Year Question Solution

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🎯 This Video is Useful For

✅ VTU 4th Semester Students

✅ BCS403 Database Management System

✅ Computer Science Engineering (CSE)

✅ Information Science Engineering (ISE)

✅ Semester End Examination (SEE)

✅ Internal Assessment (CIE)

✅ Previous Year Questions (PYQs)

✅ SQL Practice

✅ Placement Preparation

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📘 Subject Details

📚 Subject: Database Management System (DBMS)

📝 Subject Code: BCS403

🎓 Semester: 4th Semester

🏛 University: Visvesvaraya Technological University (VTU)

📖 Module: Module 4

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📺 Complete DBMS Course Available

📌 Module 1 – Introduction to Database & ER Model

📌 Module 2 – Relational Model & Relational Algebra

📌 Module 3 – Normalization

📌 Module 4 – SQL & Transaction Processing

📌 Module 5 – NoSQL Databases & MongoDB

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📌 PL/SQL Programs

📌 Important Numericals

📌 Previous Year Questions

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DBMS Module 4, DBMS Important Numericals, Serializability in DBMS, Conflict Serializability, Precedence Graph, Transaction Scheduling, SQL Queries, SQL Query Problems, SQL CREATE TABLE, SQL JOIN, GROUP BY, Aggregate Functions, Sailors Boats Reserves SQL Questions, Database Management System, BCS403 VTU, VTU DBMS, DBMS Previous Year Questions, VTU Exam Preparation, CSE DBMS, ISE DBMS, SQL Practice.

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