帮忙优化一条SQL语句
select distinct SaleWholesalerID,SaleFileNo,SaleContract,SaleDate,Sale.other from ((Sale left join Wholesaler on Sale.SaleWholesalerID=Wholesaler.WholesalerID) left join Product on Sale.SaleProductID=Product.ProductID) where PayDate>=#"&StartDate&"# and PayDate<=#"&EndDate&"# order by SaleDate desc,SaleFileNo desc


数据库ACCESS

各位高手.帮忙看一下

------解决方案--------------------
PayDate , SaleDate, SaleFileNo 都在哪个表中。

语句没什么可改变的了，需要做的是添加适当的索引。