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  Unit 3: Database concepts and the Structured Query Language  Database Concepts: Introduction to database concepts and its need, Database Management System. Relational data model: Concept of domain, tuple, relation, candidate key, primary key, alternate key Advantages of using Structured Query Language, Data Definition Language, Data Query Language and Data Manipulation Language, Introduction to MySQL, creating a database using MySQL, Data Types Data Definition: CREATE DATABASE, CREATE TABLE, DROP, ALTER Data Query: SELECT, FROM, WHERE with relational operators, BETWEEN, logical  operators, IS NULL, IS NOT NULL Data Manipulation: INSERT, DELETE, UPDATE [24/07, 7:04 PM] Meta AI: Here are some MCQs on the topic "Database Concepts" with explanations: MCQ 1: What is the primary purpose of a database management system (DBMS)? A) To store data B) To manage data C) To secure data D) To recover data Answer: B) To manage data Explanation: A DBMS is a software system that manages and

Informatics Practices (2024-25)  CLASS XI Code No. 065 Unit 1: Introduction to Computer System  Introduction to computer and computing:  evolution of computing devices, components of a computer system and their interconnections, Input/output devices. Computer Memory: Units of memory, types of memory – primary and secondary, data deletion, its recovery and related security concerns. Software: purpose and types – system and application software, generic and specific purpose software. Unit 2: Introduction to Python Basics of Python programming, execution modes: - interactive and script mode, the structure of a program, indentation, identifiers, keywords, constants, variables, types of operator, precedence of operators, data types, mutable and immutable data types, statements, expression evaluation. comments, input and output statements, data type conversion, debugging. Control Statements: if-else, if-elif-else, while loop, for loop  Lists: list operations - creating, initializing, travers