Task: Text to Code
Input (English): Step 1: find the StuID of Has_Pet table.
Step 2: find without repetition the Fname, Age of Student table whose Student's StuID not one of the results of step 1
Output (English): SELECT DISTINCT T1.Fname , T1.Age FROM Student AS T1 WHERE T1.StuID NOT IN ( SELECT T2.StuID FROM Has_Pet AS T2 )