insert into yk_buy (buy_time,buy_price,number,interest,handling_charge,
buy_user_id,total_price,everyissue_price)
values (#{buyTime},#{buyPrice},#{number},#{interest},#{handlingCharge},#{buyUserId},#{totalPrice},#{everyissuePrice})
update yk_buy
set loan_user_id = #{userId},
status = 1
where id = #{id}