CREATE TABLE song (Singer_ID VARCHAR); CREATE TABLE singer (Name VARCHAR, Singer_ID VARCHAR)
SELECT T1.Name FROM singer AS T1 JOIN song AS T2 ON T1.Singer_ID = T2.Singer_ID GROUP BY T1.Name HAVING COUNT(*) > 1
แสดงชื่อนักร้องที่มีมากกว่าหนึ่งเพลง
Show the names of singers that have more than one song.