Find Duplicate Full Names

Postgres Engine
Database Schema
Question (#47)
List first_name, last_name, name_count of the patients, including only people who share the same first and last name (each shown once). name_count is the number of duplicates for each full name. The displayed results are sorted alphabetically by first_name and last_name.
Expected Output
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Databases & Questions
Hint
Group by both name columns and keep the groups that occur more than once.
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