本文深入探讨了排序算法和数据结构在计算机科学中的核心作用，涵盖了从基本算法到复杂结构的应用实例，旨在帮助读者理解如何高效地组织和操作数据。
select T.* from (
select KURL ,
Sortup=sum (case when (InitialPage>CurrentPage or
(InitialPage = CurrentPage and InitialRank > CurrentRank)) then 1 else 0 end),
Sortdown=sum (case when (InitialPage<CurrentPage or
(InitialPage = CurrentPage and InitialRank < CurrentRank)) then 1 else 0 end),
Thesame=sum(case when(InitialPage = CurrentPage and InitialRank=CurrentRank) then 1 else 0 end),
firstpage=sum(case when(CurrentPage=1) then 1 else 0 end),row_number() over(order by KURL asc) as RowNum
from Keywords
group by KURL)T
where RowNum between {0} and {1}
select KURL ,
Sortup=sum (case when (InitialPage>CurrentPage or
(InitialPage = CurrentPage and InitialRank > CurrentRank)) then 1 else 0 end),
Sortdown=sum (case when (InitialPage<CurrentPage or
(InitialPage = CurrentPage and InitialRank < CurrentRank)) then 1 else 0 end),
Thesame=sum(case when(InitialPage = CurrentPage and InitialRank=CurrentRank) then 1 else 0 end),
firstpage=sum(case when(CurrentPage=1) then 1 else 0 end),row_number() over(order by KURL asc) as RowNum
from Keywords
group by KURL)T
where RowNum between {0} and {1}
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