Practise a first SQL query sequence: select columns, filter rows, group results, and distinguish WHERE from HAVING.
This beginner sequence builds an exploratory query in small, reviewable steps. Begin by selecting columns from a table, narrow the records with a row condition, summarize the filtered rows by category, and then distinguish filters on source rows from conditions on grouped results. The lessons are demonstrations, not a promise of a particular database setup; use a safe practice table and adapt dialect-specific details to your environment.
Read a simple SELECT and FROM query and choose only needed columns. Apply a WHERE condition and explain which source rows it retains. Use GROUP BY and ORDER BY, and distinguish WHERE from HAVING.
No SQL experience required. Familiarity with rows, columns, and a table is useful. A database installation is optional for completing the paper-query exercises.
Beginners who want a clear, guided introduction without unnecessary jargon
People who learn best through examples, guided lessons, and hands-on practice
Professionals, creators, and independent builders looking for a repeatable workflow
Lesson 1 is free
4 lessons · Beginner · Full course.
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