Now compare the Customer_Number in the &quot; Orders &quot; table with the Customer_ID from the &quot; Customers &quot; table, which can be done, for example, using the x variable with the following SQL statement:
现在比较“Orders”表格中的 Customer_Number 和“Customers”表格中的 Customer_ID。比较时可以使用 x 变量和以下 SQL 语句：