Oracle开发专题之：分析函数总结（转载）
这一篇是对前面所有关于分析函数的文章的总结：
一、统计方面：
Sum(
)?Over?([Partition?by?]?[Order?by?])Sum()?Over?([Partition?by?]?[Order?by?]???????Rows?Between??Preceding?And??Following)???????Sum()?Over?([Partition?by?]?[Order?by?]?????Rows?Between??Preceding?And?Current?Row)Sum()?Over?([Partition?by?]?[Order?by?]?????Range?Between?Interval?''?'Day'?Preceding????????????????????And?Interval?''?'Day'?Following?)
具体请参考《Oracle开发专题之：分析函数(OVER)》和《Oracle开发专题之：窗口函数》
二、排列方面：
Rank()?Over?([Partition?by?]?[Order?by?]?[Nulls?First/Last])]?[Order?by?]?[Nulls?First/Last])???Row_number()?Over?([Partitionby?]?[Order?by?]?[Nulls?First/Last])???Ntile()?Over?([Partition?by?]?[Order?by?])
具体请参考《Oracle开发专题之：分析函数2(Rank, Dense_rank, row_number) 》
三、最大值/最小值查找方面：
Min()/Max()?Keep?(Dense_rank?First/Last?[Partition?by?]?[Order?by?])
具体请参考《Oracle应用专题之：分析函数3(Top/Bottom N、First/Last、NTile) 》
四、首记录/末记录查找方面：
First_value?/?Last_value(Sum()?Over?([Patition?by?]?[Order?by?]???????Rows?Between??Preceding?And??Following??))
具体请参考《Oracle开发专题之：窗口函数》
五、相邻记录之间比较方面：
Lag(Sum(),?1)?Over([Patition?by?]?[Order?by?])
具体请参考《Oracle开发专题之：窗口函数》
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转载自：http://www.blogjava.net/pengpenglin/archive/2008/06/29/211491.html
