Course overview
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.
Key skills
- Building and organizing complex queries
- Querying data across multiple tables
- Identifying table relations
- Answering business questions using SQL
Course outline
Intermediate SQL for Data Analysis [6 lessons]
Joining Data in SQL 2h
Lesson Objectives- Employ the four common join types
- Employ joins with subqueries to write intermediate queries
- Employ joins to answer business questions
Intermediate Joins in SQL 2h
Lesson Objectives- Write queries that join three or more tables
- Identify recursive joins, pattern matching, and the case statement
- Write advanced joins
Building and Organizing Complex Queries 3h
Lesson Objectives- Format queries to make them readable
- Employ the "with" clause
- Employ set operations to combine tables
Guided Project: Answering Business Questions Using SQL 3h
Lesson Objectives- Frame a business question into advanced SQL queries
- Employ pandas plot methods to create visualizations of your query results
- Write analyses to communicate the results of your work
Table Relations and Normalization 2h
Lesson Objectives- Employ the SQLite shell with databases
- Create and normalize database tables
- Insert and update data in database tables
Querying SQLite from Python 1h
Lesson Objectives- Run SQL queries using sqlite3 in Python
- Employ cursors and tuples
Projects in this course
Answering Business Questions Using SQL
Learn the SQL data analysis workflow.
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