Oracle开发课题之:分析函数总结(转载)
Oracle开发专题之:分析函数总结(转载)
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 )
Rank() Over ([Partition by
] [Order by
] [Nulls First/Last])

Dense_rank() Over ([Patition by
] [Order by
] [Nulls First/Last])
Row_number() Over ([Partitionby
] [Order by
] [Nulls First/Last])
Ntile(
) Over ([Partition by
] [Order by
])
Min(
)/Max(
) Keep (Dense_rank First/Last [Partition by
] [Order by
])
First_value / Last_value(Sum(
) Over ([Patition by
] [Order by
]
Rows Between
Preceding And
Following ))
Lag(Sum(
), 1) Over([Patition by
] [Order by
])
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:
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:
Dense_rank() Over ([Patition 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:
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:
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:
具体请参考《Oracle开发专题之:窗口函数》
转载自:http://www.blogjava.net/pengpenglin/archive/2008/06/29/211491.html