oracle 分析函數 - 總結

標籤：比較   win   color   min   first   val   rank   last   font   

一、統計方面：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 )二、排列方面：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 ])三、最大值/最小值尋找方面：Min()/Max() Keep (Dense_rank First/Last [Partition by ] [Order by ])四、首記錄/末記錄尋找方面：First_value / Last_value(Sum() Over ([Patition by ] [Order by ] Rows Between  Preceding And  Following  ))五、相鄰記錄之間比較方面：Lag(Sum(), 1) Over([Patition by ] [Order by ])

 

oracle 分析函數 - 總結