Task: Text to Code
Input (English): Step 1: find the number of rows of each value of customer_id in customer table.
Step 2: find first_name, last_name, customer_id in customer table whose corresponding value in step 1 is greater than or equals 1
Output (English): SELECT first_name , last_name , customer_id FROM customer GROUP BY customer_id HAVING Count ( * ) > = 1