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 )
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/最小值查找方面：
Min()/Max() Keep (Dense_rank First/Last [Partition by ] [Order by ])
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 ))
五、相邻记录之间比较方面：
Lag(Sum(), 1) Over([Patition by ] [Order by ])
