Computer Science Databases SQL, or Structured Query Language, is the standard programming language used for managing and manipulating data stored in relational databases. It enables users to perform a wide range of operations, including querying for specific information, inserting, updating, and deleting records, as well as creating and modifying the database's underlying structure, such as tables and indexes. As a declarative language standardized by ANSI and ISO, SQL provides a consistent and powerful interface to interact with the vast majority of relational database management systems (RDBMS) like MySQL, PostgreSQL, and Microsoft SQL Server, making it a cornerstone skill in data management and application development.
1.1.
What is a Database
1.1.1.
Definition and Core Concepts
1.1.2.
Data vs Information
1.1.3.
Structured vs Unstructured Data
1.1.4.
Data Storage Mechanisms
1.1.5.
Data Retrieval Principles
1.1.6.
Real-World Database Examples
1.1.6.1. E-commerce Systems
1.1.6.3. Social Media Platforms
1.1.6.4. Healthcare Records
1.1.6.5. Educational Management Systems
1.2.
Database Management Systems
1.2.1.
DBMS Definition and Role
1.2.2.
Core DBMS Functions
1.2.2.1. Data Storage Management
1.2.2.2. Data Organization
1.2.2.4. Transaction Management
1.2.2.5. Backup and Recovery
1.2.2.6. User Access Management
1.2.3.
DBMS Architecture
1.2.3.1. Three-Schema Architecture
1.2.4.
Benefits of Using DBMS
1.2.4.1. Data Independence
1.2.4.2. Reduced Data Redundancy
1.2.4.5. Concurrent Access
1.3.
Types of Database Systems
1.3.1.
Relational Databases
1.3.1.1. Tabular Structure
1.3.1.2. SQL-Based Systems
1.3.1.4. Common Relational DBMS
1.3.2.
Non-Relational Databases
1.3.2.2. Document Databases
1.3.2.3. Column-Family Databases
1.3.2.5. Use Cases for NoSQL
1.3.3.
Hierarchical Databases
1.3.5.
Object-Oriented Databases
1.4.
The Relational Model
1.4.1.
Fundamental Concepts
1.4.1.1. Relations and Tables
1.4.1.3. Attributes and Columns
1.4.2.
Relational Structure
1.4.3.
Keys in Relational Model
1.4.3.1.1. Definition and Purpose
1.4.3.1.2. Uniqueness Requirement
1.4.3.1.3. Non-Null Constraint
1.4.3.1.4. Single vs Composite Primary Keys
1.4.3.2.1. Definition and Purpose
1.4.3.2.2. Referential Integrity
1.4.3.2.3. Parent-Child Relationships
1.4.3.2.4. Cascade Operations
1.4.3.6.1. Multi-Column Keys
1.4.3.6.2. When to Use Composite Keys
1.4.4.
Relationships Between Tables
1.4.4.1. One-to-One Relationships
1.4.4.1.1. Definition and Examples
1.4.4.1.2. Implementation Strategies
1.4.4.2. One-to-Many Relationships
1.4.4.2.1. Definition and Examples
1.4.4.2.2. Foreign Key Implementation
1.4.4.3. Many-to-Many Relationships
1.4.4.3.1. Definition and Examples
1.4.4.3.2. Junction Tables
1.4.5.
Data Integrity
1.4.5.2. Referential Integrity
1.4.5.4. User-Defined Integrity
1.5.
Introduction to SQL
1.5.1.
SQL Overview
1.5.1.1. Definition and Purpose
1.5.1.2. SQL as Standard Language
1.5.1.3. Declarative Nature
1.5.2.
SQL History and Evolution
1.5.2.2. ANSI SQL Standards
1.5.2.3. ISO SQL Standards
1.5.2.4. Major Version Milestones
1.5.3.
SQL vs Other Database Languages
1.5.3.1. Declarative vs Procedural
1.5.3.2. Set-Based Operations
1.5.3.3. Non-Procedural Approach
1.5.4.
SQL Dialects and Vendors
1.5.4.1.1. Open Source Nature
1.5.4.1.2. Web Application Focus
1.5.4.2.1. Advanced Features
1.5.4.2.2. Standards Compliance
1.5.4.3. Microsoft SQL Server
1.5.4.3.1. T-SQL Extensions
1.5.4.3.2. Enterprise Features
1.5.4.3.3. Integration with Microsoft Stack
1.5.4.4.1. PL/SQL Extensions
1.5.4.4.2. Enterprise Scalability
1.5.4.4.3. Advanced Analytics
1.5.4.5.1. Embedded Database
1.5.4.5.2. Serverless Architecture
1.5.4.5.3. Lightweight Design
1.6.
SQL Command Categories
1.6.1.
Data Query Language
1.6.1.1. SELECT Statements
1.6.1.2. Purpose and Scope
1.6.1.3. Read-Only Operations
1.6.2.
Data Manipulation Language
1.6.2.1. INSERT Operations
1.6.2.2. UPDATE Operations
1.6.2.3. DELETE Operations
1.6.2.4. Data Modification Focus
1.6.3.
Data Definition Language
1.6.3.1. CREATE Statements
1.6.3.4. Schema Modification
1.6.4.
Data Control Language
1.6.4.2. REVOKE Statements
1.6.4.3. Security and Access Control
1.6.5.
Transaction Control Language
1.6.5.1. COMMIT Operations
1.6.5.2. ROLLBACK Operations
1.6.5.3. SAVEPOINT Management
1.6.5.4. Transaction Boundaries