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