SELECT
        dv.last_invoice_total_price, 
        dv.last_invoice_paid, 
        dv.offset,
        dv.discount, 
        dv.carryover, 
        dv.total_price,
        dv.total_tax, 
        dv.purchase, 
        dv.invoice_total_price, 
        dv.deadline,
        dv.collection_date, 
        dv.period,
        cu.customer_name1,
        cu.customer_name2
    FROM
        invoice dv
        LEFT OUTER JOIN customer cu ON
            dv.customer_code = cu.customer_code
    WHERE
        dv.invoice_id = '495671'
        AND dv.invoice_line_no = 1