Free ebookSQL for Business Intelligence: From Zero to Confident Querying

Course Description

SQL for Business Intelligence: From Zero to Confident Querying is a practical ebook course designed for anyone who wants to turn raw database tables into clear, trustworthy insights. In the Information Technology space, and especially within Data Science and Business Intelligence, SQL remains the essential skill for answering business questions quickly, validating dashboard numbers, and creating analysis-ready datasets.

You will learn how to think in tables, rows, and business entities so your queries match how organizations track customers, products, orders, and revenue. Step by step, you will write reliable SELECT statements, apply WHERE filters with safe conditions, and sort and limit results to support quick quality checks and fast exploration. This progressive approach helps you build confidence while avoiding common mistakes that lead to misleading metrics.

As you advance, you will connect data across systems using joins without duplicating or losing rows, then calculate KPIs with aggregations such as COUNT, SUM, and AVG. You will use GROUP BY to create reporting tables and time series outputs that business intelligence tools can consume. The course also focuses on real-world edge cases, including working with NULLs and data quality issues, so your reporting stays accurate even when data is imperfect.

To support reusable, auditable analysis, you will practice subqueries for filtering and pre-aggregation, and write clear Common Table Expressions that make complex logic readable and easier to review. By the end, you will be able to build dashboard-ready datasets, validate results against expectations, and communicate findings with confidence in BI workflows.

Start the course now and build SQL skills that directly translate into stronger reporting, faster analysis, and better business decisions.