Intermediate course
Module 3 of 5 · ~16 min
NULL but not void
Missing values in filters, aggregates, and this database's own design
Included with Plus & Pro
NULL but not void is part of the SQLiteracy Intermediate course, included in every paid plan — starting with Plus.
Plus includes
- • Every course in the library
- • Badges and shareable verification
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Pro ($29 / month) adds the AI Coach and AI Tutor.
The SQL Scratchpad is free with no signup, and the Basic course is free with an account. AI-assisted hints are coming to SQLiteracy for Pro subscribers.