SQL
Master SQL from foundational concepts to advanced data engineering techniques tailored for enterprise databases. Covers complex SELECT queries, advanced JOIN strategies, correlated subqueries, analytical window functions, common table expressions (CTEs), execution plan analysis, hierarchical querying, and high-performance Oracle SQL optimization for large datasets.
SQL Performance Tuning and Optimization: A Comprehensive Guide
Master SQL performance tuning techniques, execution plans, bind variables, and indexing strategies to optimize database queries. A complete guide to Oracle SQL performance optimization for developers and DBAs.
Data Modeling & Database Design Best Practices
Master relational data modeling, database design principles, normalization rules (1NF, 2NF, 3NF), Star Schemas, slowly changing dimensions (SCD), and the Entity-Attribute-Value (EAV) anti-pattern. A complete architectural guide for software engineers.
SQL Advanced: Window Functions, Ranking, Running Totals & CTEs
Master advanced SQL analytics — Window Functions (OVER, PARTITION BY), ranking functions (ROW_NUMBER, RANK, DENSE_RANK, NTILE), LAG/LEAD for period comparisons, running totals and moving averages with SUM/AVG OVER, and Common Table Expressions (CTE & Recursive CTE) with real-world Oracle and PostgreSQL examples.
SQL Intermediate: Joins, Aggregates, Subqueries, Functions, Views & Indexes
Master intermediate SQL concepts in one comprehensive guide — covering all JOIN types, aggregate functions (COUNT/SUM/AVG/MIN/MAX), GROUP BY, HAVING, subqueries, UNION/INTERSECT/EXCEPT, CASE statements, COALESCE/NULLIF/NVL, string/date/math functions, SQL Views, and Indexes. Packed with Oracle, MySQL, and PostgreSQL examples.
SQL Foundations: The Complete Beginner's Guide
Master SQL from zero — covering What is SQL, data types, DDL (CREATE/ALTER/DROP), DML (INSERT/UPDATE/DELETE), SELECT, WHERE, ORDER BY, DISTINCT, LIKE/IN/BETWEEN, NULL handling, operators, LIMIT, aliases, comments, and essential functions. Oracle, MySQL, and PostgreSQL examples throughout.
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