2026 01 16 17 35 14 Code The Dream Python Essentials Mentor Class скачать в хорошем качестве

2026 01 16 17 35 14 Code The Dream Python Essentials Mentor Class

🗄️ Why SQL Matters 🎯 Learning Objectives Understand Relational Databases (RDBMS) Connect to databases using Python's `sqlite3` Write SQL queries (SELECT, INSERT, WHERE) Use SQLAlchemy for Object-Relational Mapping (ORM) Load SQL data directly into Pandas DataFrames 📚 Key Vocabulary RDBMS Relational Database Management System—a database organized into tables with rows and columns, using SQL for querying (e.g., SQLite, PostgreSQL, MySQL). SQL Structured Query Language—a standard language for interacting with relational databases (SELECT, INSERT, UPDATE, DELETE). ORM Object-Relational Mapping—a technique that lets you interact with database tables as if they were Python objects (SQLAlchemy is a popular ORM). Connection A bridge between your Python script and a database, allowing you to send queries and receive results. Cursor An object used to execute SQL queries and fetch results from a database connection. ETL Extract, Transform, Load—a data pipeline process for moving data from sources (databases) to destinations (DataFrames, data warehouses). 🗄️ SQLite Basics Work with lightweight, file-based databases using Python's built-in sqlite3 module. Perfect for local projects and prototypes.