我正在尝试计算SQL中的4天滚动平均值。我的日期格式如下。我的桌子上有很多公司。我必须分别计算每个公司的平均滚动平均值。但是我下面的查询是在不区分公司的情况下执行滚动平均。
请更正我的查询。预期输出如下:
select
[date],[PX_VOLUME],[Company],
avg([PX_VOLUME]) OVER (ORDER BY [date],[Company] ROWS BETWEEN 3 PRECEDING AND CURRENT ROW) as monthrolling
into dbo.[Equity_Indicators_window]
from dbo.[Equity_Indicators_V1]
group by [Company],[date],[PX_VOLUME]
order by [date]
输入数据:
date PX_Volume Company
2018-06-22 7455031 ABC HOLDINGS
2018-06-22 801629 LEMAITRE VASLA
2018-06-22 23951629 CLUB CORP
2018-06-23 7455041 ABC HOLDINGS
2018-06-23 801631 LEMAITRE VASLA
2018-06-23 23951643 CLUB CORP
2018-06-24 745506 ABC HOLDINGS
2018-06-24 801666 LEMAITRE VASLA
2018-06-24 23951698 CLUB CORP
2018-06-25 7455031 ABC HOLDINGS
2018-06-25 801629 LEMAITRE VASLA
2018-06-25 23951629 CLUB CORP
2018-06-26 7455031 ABC HOLDINGS
2018-06-26 801629 LEMAITRE VASLA
2018-06-26 23951629 CLUB CORP
预期输出:
date PX_Volume Company monthrolling
2018-06-22 7455031 ABC HOLDINGS 7455031
2018-06-22 801629 LEMAITRE VASLA 801629
2018-06-22 23951629 CLUB CORP 23951629
2018-06-23 7455041 ABC HOLDINGS 7455036
2018-06-23 801631 LEMAITRE VASLA 801630
2018-06-23 23951643 CLUB CORP 23951636
2018-06-24 745506 ABC HOLDINGS 5218526
2018-06-24 801666 LEMAITRE VASLA 801642
2018-06-24 23951698 CLUB CORP 23951656.67
2018-06-25 7455031 ABC HOLDINGS 5777652.25
2018-06-25 801629 LEMAITRE VASLA 801638.75
2018-06-25 23951629 CLUB CORP 23951649.75
2018-06-26 7455031 ABC HOLDINGS 5777652.25
2018-06-26 801629 LEMAITRE VASLA 801638.75
2018-06-26 23951629 CLUB CORP 23951649.75
答案 0 :(得分:1)
您的查询很难阅读 在这种情况下,我建议您使用CTE AND在您的over子句中使用partition by
with c as(
Select
[date]
,[Company]
,AVG([PX_VOLUME]) AS PX_VOLUME
from dbo.[Equity_Indicators_V1]
group by [Company],[date]
)
SELECT [date]
,[PX_VOLUME]
,[Company]
,avg([PX_VOLUME]) OVER (Partition by [date],[Company] ORDER BY [date],[Company] ROWS BETWEEN 3 PRECEDING AND CURRENT ROW ) as monthrolling
into dbo.[Equity_Indicators_window]
FROM C
尝试逐步进行
答案 1 :(得分:1)
您的问题是px_volume
中的group by
。我想你打算:
select [date], [Company], sum(px_volume) as px_volume,
avg(sum(px_volume)) over (partition by company
order by [date]
rows between 3 preceding and current_row
) as monthrolling
into dbo.[Equity_Indicators_window]
from dbo.[Equity_Indicators_V1]
group by [Company], [date]
order by [date] ;
请注意partition by company
。
如果每个公司每个日期有一行,则不需要汇总。那应该是:
select [date], Company, px_volume,
avg(px_volume) over (partition by company
order by [date]
rows between 3 preceding and current_row
) as monthrolling
into dbo.[Equity_Indicators_window]
from dbo.[Equity_Indicators_V1]
order by [date]
答案 2 :(得分:1)
尝试以下操作(您需要将公司放在partition by子句中):
SELECT [date],
[PX_VOLUME],
[Company],
ROUND(AVG(CONVERT(NUMERIC(18,2), [PX_VOLUME])) OVER(PARTITION BY COMPANY ORDER BY [date] ROWS BETWEEN 3 PRECEDING AND CURRENT ROW), 2) AS monthrolling
INTO dbo.[Equity_Indicators_window]
FROM dbo.[Equity_Indicators_V1]
GROUP BY [Company],
[date],
[PX_VOLUME]
ORDER BY [date];