This course builds on the SQL Fundamentals course. You’ll become familiar with concepts like the different types of joins and how to combine joins with subqueries to answer business questions. You’ll learn how to write queries using three or more tables, how to perform recursive joins and pattern matching, and how to control how the data will look like with CASE statements.
As you progress, you’ll build and organize complex queries that you can make more readable using the WITH clause; you’ll also use set operations like UNION, UNION ALL, EXCEPT, and INTERSECT to combine tables. You’ll also learn to use relational database concepts like normalizing a table, designing and creating a database, and more.
Best of all, you’ll learn by doing — you’ll practice and get feedback directly in the browser. You’ll apply your skills to several guided projects involving realistic business scenarios to build your portfolio and prepare for your next interview.
Building and organizing complex queries
Querying data across multiple tables
Identifying table relations
Answering business questions using SQL
Dataquest has helped thousands of people start new careers in data. If you put in the work and follow our course, you'll master data skills and grow your career.
We believe so strongly in our courses that we offer a full satisfaction guarantee. If you complete a career course on Dataquest and aren't satisfied with your outcome, we'll give you a refund.
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