merge用法

merge into tb_car_vehpartsprice a
using tb_car_vehpartsprice_log b
on (a.id = b.id and b.id_ = ?)
when matched then
  update
     set a.supply_id     = b.supply_id,
         a.class_id      = b.class_id,
         a.parts_id      = b.parts_id,
         a.bid_price     = b.bid_price,
         a.sts           = b.sts,
         a.factory_price = b.factory_price,
         a.raise_price   = b.raise_price
   where b.id_ = ?