Database Concepts and SQL — Class 12 CBSE Computer Science revision notes
A 3-page visual revision sheet for Database Concepts and SQL, written for Class 12 CBSE Computer Science. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Database Concepts and SQL sheet covers
- Database, DBMS and RDBMS
- Choosing keys for a table
- Two families of SQL commands
- Choosing the right SQL command
- Creating a table
- Inserting, updating and deleting rows
- SELECT with WHERE and ORDER BY
- The order a SELECT is written in
- The aggregate functions
- GROUP BY with an aggregate function
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Computer Science chapter by chapter against your real exam dates and free hours, and when the plan reaches Database Concepts and SQL the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.