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Cheat SheetDBGATE CS 2027

Databases Cheat Sheet Pack

Fast Revision · Formulas · Traps · Visual Recall

ER model and keys, functional dependencies and normal forms, decomposition, relational algebra and TRC, SQL with NULLs, B+ trees, transactions and serializability.

  • 11 A4 pagesone topic per page
  • PDF (A4)Version 1.0.2
  • Screen editionPhones, tablets, laptops
  • Print editionPrepared for A4 printing

₹29Regular price ₹39Launch price

Launch price: ₹29 instead of the regular ₹39.

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3 of 11 pages shown as images. The purchased PDF is sharper, searchable and has clickable bookmarks.

Page 1 of 11

What is inside

11 pages, one purpose each

  1. p. 1Cover, contents and how to useThe page map, a key to every box type, and the order to read on the last day.
  2. DB-02ER Model, Keys and Integrity ConstraintsRead an ER fragment, turn it into tables, and name every key and constraint correctly
  3. DB-03Functional Dependencies, Closure and Normal FormsKeys from FDs, then the highest normal form
  4. DB-04Decomposition: Lossless Join, Dependency Preservation, Minimal CoverTest any decomposition for lossless join and preserved FDs, and build 3NF or BCNF schemas
  5. DB-05Relational Algebra and Tuple Relational CalculusCount the tuples an expression returns, and translate between algebra and calculus
  6. DB-06SQL: Query Results, NULLs and NestingPredict exactly what a SQL query returns, NULLs and duplicates included
  7. DB-07File Organization, Indexing and B+ TreesCount block accesses for a file and its index, and size or update a B+ tree
  8. DB-08Transactions, Serializability and Concurrency ControlSerializable? Recoverable? What each protocol ensures
  9. DB-09GATE Traps SheetThe wrong turns that cost marks, each with the rule that fixes it
  10. DB-10Question Patterns and Solving ApproachRecognise the pattern in the stem, then run the matching routine
  11. DB-11Master Last-Day Revision SheetEverything to reread on the last evening, one page

How each page works

Built for fast revision

  • Quick Recall boxes: the facts to hold in memory
  • Formula boxes with variables, when each applies and the usual mistake
  • Students Think / Actually: the wrong intuition next to the correct rule
  • If You See This / Do This: a cue in the question and the steps to take
  • Compare tables for look-alike concepts
  • Trap boxes: a known wrong turn and its fix
  • Edge cases that change the answer
  • Decision flows to run in order
  • Master tables for quick lookup
  • Worked mini-examples
  • Diagrams

About this pack

Scope

Revision pages for Databases in the GATE CS 2027 syllabus: ER model, keys and integrity constraints, functional dependencies, closure and normal forms, lossless join, dependency preservation and minimal cover, relational algebra and tuple relational calculus, SQL query results, NULLs and nesting, file organisation, indexing and B+ trees, and transactions, serializability and concurrency control. Every number in the pack was verified by a script. Domain calculus, recovery logs and 4NF/5NF are not named in the 2027 syllabus and get one line each.

Is it right for you?

Who it is for, and how you get it

Who it is for

GATE CS 2027 candidates who have studied the subject and want fast, reliable revision: one page per sitting of about ten minutes, then the last-day sheet before the exam.

Screen edition

For phones, tablets and laptops. Clickable bookmarks jump between pages.

Print edition

The same pages prepared for A4 printing. Both editions are included.

Preparing more than one subject?Complete GATE CS Cheat Sheet CollectionAll 12 packs including Databases, for ₹199 (launch price).

Before you buy

Common questions

What exactly will I receive?

A 11-page A4 PDF in two editions: a screen edition for reading on a device and a print edition prepared for A4 printing. Nothing is shipped; it is a download.

Can I read it on my phone, and can I print it?

Yes. The PDF opens in any PDF reader on phones, tablets and computers, and the bookmarks jump between pages. You may print it for your own study.

Is it for GATE 2027?

Yes. The packs follow the official GATE CS 2027 syllabus, and each pack says what is in scope and what is covered in another pack. GATE CS Mastery is independent and not affiliated with IIT, IISc or the GATE organising committee.

How is this different from ordinary short notes?

Each page answers one question and uses labelled boxes: rules with their conditions, traps with the fix, comparison tables and small worked examples. Every pack ends with a traps sheet, a question-patterns sheet and a one-page last-day sheet.

What happens after I pay?

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What if the payment succeeds but the download fails?

Do not pay again. Your purchase is recorded as soon as the payment is verified. Open My library, or write to support@gatecsmastery.com with your order ID or Razorpay payment ID. See the refund policy for when a refund applies.