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Database Concepts — Revision Notes

CBSE · Class 11 · Informatics Practices

Database Concepts revision notes for CBSE Class 11 Informatics Practices: 4 topics in quick points. Includes From File System to Database, DBMS, Database.

67 questions72 flashcards5 concepts

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Key Topics to Revise

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1. From File System to Database

  • Manual record keeping becomes tedious when data volume increases.
  • A class of 50 students over 26 working days requires 1300 manual attendance entries per month.
  • File systems suffer from difficulty in access, data redundancy, data inconsistency, data isolation, data dependence, and controlled data sharing.
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2. DBMS, Database Schema, Instance, and Meta-data

  • DBMS is software used to create and manage databases.
  • DBMS serves as an interface between users or application programs and the database.
  • Retrieving data through special commands is called querying the database.
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3. Relational Data Model and Relation Properties

  • The relational data model is the most commonly used data model.
  • Other data models include object-oriented, entity-relationship, document, and hierarchical models.
  • In the relational model, tables are called relations.
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4. Keys in a Relational Database

  • Keys are used to uniquely identify tuples and create relationships between relations.
  • Candidate key is any attribute that can uniquely identify tuples in a relation.
  • GUID and GPhone are candidate keys of GUARDIAN because both take unique values.

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Full Notes

Key Concepts

A file is a container usedRedundancy means the same dataData inconsistency occurs when the sameData isolation means related dataA DBMS is software used

Frequently Asked Questions

What are the important topics in Database Concepts for CBSE Class 11 Informatics Practices?
Key topics in Database Concepts include From File System to Database, DBMS, Database Schema, Instance, and Meta-data, Relational Data Model and Relation Properties, Keys in a Relational Database. Study these first, then practise questions on each for Class 11 exams.
How should I revise Database Concepts for Class 11 exams?
Learn the core ideas first, then work through the 67 practice questions on Database Concepts. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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