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Querying and SQL Functions — Study Plan

CBSE · Class 12 · Informatics Practices

A step-by-step study plan for Querying and SQL Functions, CBSE Class 12 Informatics Practices: what to learn first, what to practise and when to revise.

111 questions84 flashcards4 formulas & key relations5 concepts

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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. SQL Functions, 2. String and Date Functions, 3. Aggregate Functions and GROUP BY.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 111 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Querying and SQL Functions after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • CARSHOWROOM contains INVENTORY, CUSTOMER, SALE, and EMPLOYEE.
  • INVENTORY uses CarId as primary key.
  • CUSTOMER uses CustId as primary key.
  • Single row functions are scalar functions.
  • Aggregate functions are multiple row functions.
  • Single row functions can appear in SELECT, WHERE, and ORDER BY.
  • POWER(X,Y) and POW(X,Y) are the same function.
  • ROUND(N,D) rounds a number to D decimal places.
  • If D = 0, ROUND gives the nearest integer.

Common Mistakes to Avoid

COUNT(column) and COUNT(*) always give the same result.

WHERE can be used to filter grouped results after GROUP BY.

Aggregate functions can be used in WHERE, ORDER BY, and SELECT in the same way as single row functions.

Memory Tips

SQL function categories

Single row functions are also called scalar functions

Math, string, and date and time functions

POWER and POW

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Frequently Asked Questions

What are the important topics in Querying and SQL Functions for CBSE Class 12 Informatics Practices?
Key topics in Querying and SQL Functions include SQL Functions, String and Date Functions, Aggregate Functions and GROUP BY, Operations on Relations. Study these first, then practise questions on each for the CBSE Class 12 board exam.
How should I revise Querying and SQL Functions for the CBSE Class 12 board exam?
Learn the core ideas first, then work through the 111 practice questions on Querying and SQL Functions. 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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