Context: CREATE TABLE VISITS (Tourist_Attraction_ID VARCHAR); CREATE TABLE Tourist_Attractions (Name VARCHAR, Tourist_Attraction_ID VARCHAR)
Question: Show the names and ids of tourist attractions that are visited at most once.
Answer: SELECT T1.Name, T1.Tourist_Attraction_ID FROM Tourist_Attractions AS T1 JOIN VISITS AS T2 ON T1.Tourist_Attraction_ID = T2.Tourist_Attraction_ID GROUP BY T2.Tourist_Attraction_ID HAVING COUNT(*) <= 1