SELECT order_id ,  count(*) FROM Invoices GROUP BY order_id
How many invoices correspond to each order id?
[Schema (values) (types)]: | customers_and_invoices |  Customers : customer_id (text) , customer_first_name (number) , customer_middle_initial (text) , customer_last_name (text) , gender (text) , email_address (text) , login_name (text) , login_password (text) , phone_number (text) , town_city (text) , state_county_province (text) , country (text) | Orders : order_id (text) , customer_id (number) , date_order_placed (text) , order_details (text) | Invoices : invoice_number (text) , order_id (number) , invoice_date (text) | Accounts : account_id (text) , customer_id (number) , date_account_opened (text) , account_name (text) , other_account_details (text) | Product_Categories : production_type_code (text) , product_type_description (number) , vat_rating (text) | Products : product_id (text) , parent_product_id (number) , production_type_code (text) , unit_price (text) , product_name (text) , product_color (text) , product_size (text) | Financial_Transactions : transaction_id (text) , account_id (number) , invoice_number (text) , transaction_type (text) , transaction_date (text) , transaction_amount (text) , transaction_comment (text) , other_transaction_details (text) | Order_Items : order_item_id (text) , order_id (number) , product_id (text) , product_quantity (text) , other_order_item_details (text) | Invoice_Line_Items : order_item_id (text) , invoice_number (number) , product_id (text) , product_title (text) , product_quantity (text) , product_price (text) , derived_product_cost (text) , derived_vat_payable (text) , derived_total_cost (text);