mysql查询语句jsp 现在有一个表a,里面有一列为time,jsp中有两个变量fnum(本页首数),lnum(本页尾数),如何实现按照time倒序排列并且每页在fnum,lnum之间呢select * from a where time limit fnum,lnum order by time desc??这样感觉不大对。。。求大虾解答