Introduction to SQL

• Overview of databases and SQL.
• Types of SQL databases: MySQL, PostgreSQL, SQL Server.
  
  

Basic SQL Commands

• SELECT, INSERT, UPDATE, DELETE.
• Filtering data with WHERE, ORDER BY, and LIMIT.
  
  

Working with Tables

• Creating, modifying, and deleting tables.
• Understanding data types.
  
  

Joins and Relationships

• INNER, LEFT, RIGHT, FULL JOIN.
• Keys and foreign key concepts.
  
  

Aggregations and Grouping

• GROUP BY, HAVING.
• Using SUM, AVG, COUNT.
  
  

Advanced SQL

• Subqueries, views, stored procedures.
• Indexing and performance optimization.
  
  

SQL for Data Analysis

• Case statements and window functions.
• Common table expressions (CTEs).