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Code Health
Number of open pull requests Might be more telling than total pull requests
GHTorrent
SELECT count(distinct pull_request_id) as num_still_open, projects.name as project_name, projects.url as url FROM msr14.pull_request_history join pull_requests on pull_request_history.pull_request_id = pull_requests.id join projects on pull_requests.base_repo_id = projects.id where pull_request_id not in (SELECT pull_request_id FROM msr14.pull_request_history where action = 'closed') group by projects.id
Anna Buhman