Context: CREATE TABLE Maintenance_Engineers (engineer_id VARCHAR, first_name VARCHAR, last_name VARCHAR); CREATE TABLE Engineer_Visits (Id VARCHAR)
Question: Which engineer has visited the most times? Show the engineer id, first name and last name.
Answer: SELECT T1.engineer_id, T1.first_name, T1.last_name FROM Maintenance_Engineers AS T1 JOIN Engineer_Visits AS T2 GROUP BY T1.engineer_id ORDER BY COUNT(*) DESC LIMIT 1