Become proficient in structured query language and relational database management — essential skills for every developer.
Data is the New Oil — SQL is How You Extract It
Every application stores data in a database. Every developer, analyst, and data scientist needs SQL. It is one of the most universally useful skills in tech — and one of the easiest to learn. Whether you want to become a developer, data analyst, business analyst, or database administrator, SQL is a non-negotiable skill on your resume.
What You Will Master
- Database Fundamentals — What is a database, RDBMS concepts, MySQL installation
- SQL Queries — SELECT, WHERE, ORDER BY, LIMIT, DISTINCT, aliases
- Filtering & Sorting — AND/OR, IN, BETWEEN, LIKE, wildcards
- Aggregate Functions — COUNT, SUM, AVG, MIN, MAX, GROUP BY, HAVING
- JOINs — INNER, LEFT, RIGHT, FULL, CROSS, self joins
- Subqueries — Nested queries, correlated subqueries, EXISTS
- Database Design — Normalization (1NF, 2NF, 3NF), ER diagrams, primary/foreign keys
- Advanced Features — Views, stored procedures, triggers, indexes, transactions
- Performance — Query optimization, EXPLAIN, indexing strategies
- Real-world Projects — Design and query databases for e-commerce, school, hospital systems