Structured Query a Language (SQL)
CBSE · Class 12 · Computer Science
Summary of Structured Query a Language (SQL) for CBSE Class 12 Computer Science. Key concepts, important points, and chapter overview.
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SQL (Structured Query Language) is a powerful programming language designed specifically for managing and manipulating data in relational database management systems (RDBMS) like MySQL. This chapter provides comprehensive coverage of SQL fundamentals, from creating databases and tables to performing
Key Concepts
SQL is a descriptive query language
SQL is a descriptive query language that allows users to specify what data they want rather than how to retrieve it. It is case-insensitive and uses s
MySQL supports various data types including
MySQL supports various data types including CHAR(n), VARCHAR(n), INT, FLOAT, and DATE. Constraints like NOT NULL, UNIQUE, DEFAULT, PRIMARY KEY, and FO
CREATE DATABASE and CREATE TABLE statements
CREATE DATABASE and CREATE TABLE statements establish database structure. ALTER TABLE modifies existing structures by adding/removing columns, changin
INSERT INTO adds new records
INSERT INTO adds new records, SELECT retrieves data with various filtering options, UPDATE modifies existing records, and DELETE removes records. Thes
The SELECT statement retrieves data using
The SELECT statement retrieves data using clauses like WHERE (conditions), ORDER BY (sorting), DISTINCT (unique values), and supports pattern matching
Learning Objectives
- Understand the fundamentals of SQL and its role in database management
- Learn to create and manage databases and tables using DDL commands
- Master data manipulation operations including insertion, updating, and deletion
- Develop skills in querying databases using SELECT statements with various clauses
- Apply SQL functions for data processing and analysis
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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