NCERT Book Class 12 Computer Science Chapter 9 SQL PDF

Download the Class 12 Computer Science Chapter 9 Structured Query Language (SQL) NCERT Book PDF free, straight from the official NCERT textbook and matched to the 2026-27 CBSE syllabus. This is the original chapter, with the exact text on DDL, DML and DQL commands, the MySQL data types, the worked CREATE, INSERT and SELECT statements, and the GROUP BY and join examples that the board exam is set from.

• The full NCERT chapter on SQL, with every worked CREATE, INSERT, SELECT, UPDATE and DELETE query.
• Includes the back-exercise of 8 questions on RDBMS, SQL functions, joins and constraints.
• Pairs with the NCERT Solutions, Notes and Handwritten Notes linked lower on this page.

This is the official NCERT Computer Science Chapter 9 text, hosted free for Class 12 students and matched to the 2026-27 CBSE syllabus.

What Is Inside the SQL NCERT Book Chapter

Structured Query Language (SQL) is the ninth chapter of the Class 12 Computer Science NCERT textbook. It teaches how to create a database, put data into tables and pull answers back out using SQL, run on MySQL. The chapter is almost all worked queries, so students learn each command by reading a small example first and then trying it. The list below shows what the original chapter holds, so students know what they are downloading.

• What SQL is: a query language for an RDBMS such as MySQL, Oracle or SQL Server that lets you store, change and read data without saying how.
• Defining data (DDL): CREATE, ALTER and DROP to build the database and the table structure with the right data types.
• Changing data (DML): INSERT, UPDATE and DELETE to add, edit and remove rows.
• Asking questions (DQL): the SELECT statement with WHERE, ORDER BY, GROUP BY, functions and joins.

Reading the original chapter matters because the board marks queries against the NCERT syntax. A student who has read the textbook once will write a SELECT or a GROUP BY the way the examiner expects, which the Notes and Solutions then reinforce.

Topic List of the NCERT Chapter

The chapter follows a clear order, and the PDF keeps the NCERT section headings. The table below lists each section with a one-line note, so students can see the shape of the chapter before they read. It also helps with planning revision.

The most exam-heavy sections are data query, functions and GROUP BY, so students should read those slowly. Table-based query questions come up in nearly every board paper, so it is worth a careful first read rather than a skim.

SQL Commands Covered in the Chapter

The single most useful idea in the chapter is that SQL splits into command families, and each family has a job. Students who learn this can pick the right command on sight and answer the query questions the board reuses. A short summary is below so students can see what the PDF carries, but the full worked queries are in the download.

Here is a CREATE TABLE exactly in the NCERT style, so students get used to the real form. It sets the data type and a constraint for each column:

CREATE TABLE Student (
    RollNo   INTEGER PRIMARY KEY,
    Name     VARCHAR(30) NOT NULL,
    Marks    DECIMAL(5,2)
);

The SELECT statement is the one the board tests most, because it answers most questions. The example below filters rows with WHERE and sorts them with ORDER BY, just as the chapter shows:

SELECT Name, Marks
FROM Student
WHERE Marks > 75
ORDER BY Marks DESC;

For totals and counts, the chapter uses aggregate functions with GROUP BY. The query below finds the average marks per class, which is a very common board question:

SELECT Class, AVG(Marks)
FROM Student
GROUP BY Class;

How to Download the Class 12 Computer Science Chapter 9 PDF

The PDF is free and easy to save on any device. The steps below show students how to get the chapter and keep it for offline reading. No login or payment is needed at any stage.

• Open the download card at the top of this page and tap the PDF button.
• Save to your device so you can read the chapter offline, even without internet.
• Print if you prefer paper: the query blocks and the sample tables stay clear when printed.
• Pair it with the NCERT Solutions linked below to attempt the 8 back-exercise questions as you read.

Many students search for the class 12 computer science chapter 9 sql pdf the night before a practical or board exam, so a saved copy means you can revise even when the network is down. Keep the textbook PDF and the solved answers together for a full self-study set.

Why Read the Original NCERT Chapter

Notes and solutions are useful, but the original chapter is the source they all come from. There are clear reasons to read it at least once. The points below explain why the textbook still matters even when quick notes are everywhere.

• Board syntax: the chapter's own CREATE, SELECT and GROUP BY form is the safest pattern to copy in the exam.
• Full context: the chapter explains why a primary key matters and when to use HAVING instead of WHERE, points notes often cut for space.
• Worked examples: the sample tables and the query outputs are exactly what board questions are built from.
• Exercise: the back-exercise is the exact set the Solutions answer, so reading it first sharpens recall.

The honest takeaway is that the textbook is the master copy. Read it once to understand each command, then move to the Notes for revision and the Solutions for practice. That order builds stronger query writing than starting from notes alone.

How the Book PDF Pairs with the Solutions and Notes

The Book PDF gives you the original text and queries. To study the chapter fully, use it with the other resources for the same chapter, all linked in the table below. The chapter sits between Database Concepts (Chapter 8) and Computer Networks (Chapter 10), so a quick recap of database concepts first makes the table and key ideas click faster.

Tip: read the NCERT chapter first for the full picture, then revise from the Notes and test yourself with the Solutions. The textbook is where every good SQL answer starts.

All NCERT Book PDFs for Class 12 Computer Science

The table links the NCERT Book PDF for every chapter in Class 12 Computer Science, so students can download the whole course in one place. Structured Query Language (SQL) is highlighted.

FAQs on SQL NCERT Book PDF