a.contract_id, a.customer, a.code, a.project_id, a.salesperson_id, a.department_id, a.sign_date, a.duration, a.type, a.product_service, a.payment_date, a.payment_address, a.amount, a.account_number, a.notes, a.contract_status, a.create_time, a.create_by, a.update_time, a.update_by