Module 1: Introduction to SQL
What is SQL & Relational Databases; Overview of Database Management Systems (MySQL, PostgreSQL, SQL Server); Setting up your environment; Writing your first SELECT queries; Filtering data with WHERE clause; Sorting and limiting results
Module 2: Data Retrieval & Functions
Aggregate functions: COUNT, SUM, AVG, MIN, MAX; GROUP BY and HAVING clauses; String, numeric, and date functions; Aliases and formatting results; Handling NULL values
Module 3: Data Manipulation
Inserting data (INSERT); Updating data (UPDATE); Deleting data (DELETE); Transaction basics (COMMIT, ROLLBACK); Bulk operations and constraints
Module 4: Table Management & Relationships
Creating and altering tables (CREATE, ALTER); Primary keys, foreign keys, unique and not null constraints; Understanding table relationships: One-to-One, One-to-Many, Many-to-Many; JOIN operations: INNER, LEFT, RIGHT, FULL OUTER; Self-joins and cross joins
Module 5: Advanced Queries
Subqueries and nested SELECTs; CASE statements and conditional logic; Window functions: ROW_NUMBER(), RANK(), OVER(); CTEs (Common Table Expressions); Views and materialized views
Module 6: Performance & Optimization
Indexing strategies; Query optimization tips; Analyzing execution plans; Handling large datasets efficiently; Normalization vs. Denormalization
Module 7: Practical Projects
Sales database analysis; Employee management system queries; Reporting dashboards with SQL; Real-world data cleaning and aggregation; Capstone project: End-to-end database query project
Module 8: SQL Certification Preparation (Optional)
SQL fundamentals review; Advanced query exercises; Mock tests; Best practices for SQL exams