Task: Text to Code
Input (English): Step 1: find the number of rows of each value of teacher_id in Teachers table.
Step 2: find teacher_id, first_name of Teachers table ordered descending by the results of step 1.
Step 3: only show the first 3 rows of the results
Output (English): SELECT teacher_id , first_name FROM Teachers GROUP BY teacher_id ORDER BY Count ( * ) Desc LIMIT 3