Question

我试图将新列添加到名为#opp_level的现有临时表中。此新列应按帐号反映当前截止日期前6个月的平均支出。

我下面尝试了以下2种方法，但没有成功。

方法1：

SELECT 
[Close Date],
[Prior 6 Mo Date],
[Opportunity Id],
[Account Name],
[Account Number],
[Total Opportunity Amount],
AVG([Total Opportunity Amount]) OVER (
PARTITION BY [Account Number]
ORDER BY [Close Date]
RANGE BETWEEN [Prior 6 Mo Date] and [Close Date] --also tried BETWEEN 
unbounded preceding and current row
)
FROM #opp_level
ORDER BY 
[Close Date],
[Prior 6 Mo Date],
[Opportunity Id],
[Account Name],
[Account Number],
[Total Opportunity Amount]

方法2：

select a.[Close Date],a.[Total Opportunity Amount], avg(b.[Total 
Opportunity Amount]) AS [Prior 6 Mo Avg]
from #opp_level a
join #opp_level b
  on b.[Close Date]
     between dateadd(MONTH, -6, a.[Close Date]) and a.[Close Date]
group by a.[Close Date], a.[Total Opportunity Amount]
ORDER BY a.[Close Date]

我的当前数据集看起来没有前6个月平均列。这是我要添加的列。

 Close Date  Prior 6 Mo Date  Opportunity Id  Account Name  Account Number  Total Opportunity Amount  Prior 6 Month Avg Opp Spend
1/1/2018      7/1/2017            12345        A Team         8763496                50                         50
6/1/2018      12/1/2017           12345        A Team         8763496                1000                     525
11/1/2018     5/1/2018            12345        A Team         8763496                500                      750
1/1/2018      7/1/2017            67890        B Team         9812081                300                      300
6/1/2018      12/1/2017           67890        B Team         9812081                2000                     1150
11/1/2018     5/1/2018            67890        B Team         9812081                80                         1040

Answer 1

我认为您快到了。在您的第一个查询中，只需替换为：

AVG([Total Opportunity Amount]) OVER (
PARTITION BY [Account Number]
ORDER BY [Close Date]
RANGE BETWEEN [Prior 6 Mo Date] and [Close Date] --also tried BETWEEN 
unbounded preceding and current row

对此：

AVG([Total Opportunity Amount]) OVER (
PARTITION BY [Account Number]
ORDER BY [Close Date]
ROWS BETWEEN 1 preceding and current row)

如何通过ID列获得滞后的6个月平均值

1 个答案: