Find Patients With the Tallest and Shortest Height

Postgres Engine
Database Schema
Question (#20)
Display (full_name, height) of the patients with the highest and lowest height. full_name is first_name concatenated with last_name. Sort by height ascending and do not show rows where height is NULL. If two patients have the same height, sort by full_name alphabetically.
Expected Output
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Databases & Questions
Hint
You need both the tallest and the shortest patients, and ties count. Ranking helps, and NULL heights need special care.
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