CREATE TABLE weekly_reports ( user_id INTEGER, project_id INTEGER, week INTEGER, development_time INTEGER, meeting_time INTEGER, admin_time INTEGER, own_work_time INTEGER, study_time INTEGER, testing_time INTEGER, signed_by INTEGER, FOREIGN KEY (user_id) REFERENCES users(id), FOREIGN KEY (project_id) REFERENCES projects(id), FOREIGN KEY (signed_by) REFERENCES users(id), PRIMARY KEY (user_id, project_id, week) )