SQL1 course · 5 one-hour sessions

Databases & SQL

From what a database actually is to designing schemas and writing real SQL queries with confidence.

Finish every session and get the Databases & SQL certificate of completion, with your name, a link anyone can check, and one-click LinkedIn.

SQLStandalone course

Databases & SQL Fundamentals

From what a database actually is to designing schemas and writing real SQL queries with confidence.

5 sessions · 60 min eachBeginner

See the 5 sessions and start

Schemas, Joins & Real Queries

SELECT students.name, courses.title
FROM enrollments
JOIN students ON enrollments.student_id = students.id
JOIN courses ON enrollments.course_id = courses.id
WHERE students.age >= 21
ORDER BY students.name;

-- one query, three related tables