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Generated columns
Learn Generated columns in SQLite through the exact construct, a dedicated example, a boundary case, and a mastery check.
Generated columns is an atomic SQLite lesson inside Constraints & Schema. The example uses the specific syntax, command, API, instruction, or language rule named by this lesson.
Study the construct itself, then change one relevant input and predict the result before running it. That keeps this lesson focused on Generated columns rather than on generic SQLite syntax.
Topic-specific example
CREATE TABLE rect(w REAL,h REAL,area REAL GENERATED ALWAYS AS (w*h) STORED);
Test Generated columns with an empty result, NULL/missing value, duplicate key, or concurrent operation where relevant; database behavior should be verified at the boundary shown by this example.