RowNumber() 和 Partition By 性能需要帮助

我有一张股票市场移动平均值表，我试图比较一天内的两个值，然后将该值与前一天的相同计算值进行比较。我的 sql 如下...当我注释掉定义结果集的最后一个 select 语句，并运行显示为结果集的最后一个 cte 时，我会在大约 15 分钟内取回数据。很长，但易于管理，因为它将作为插入存储过程运行过夜。当我如图所示运行它时，我还需要 40 分钟才能得到任何结果。有什么想法吗？它从有点慢到爆炸，可能还加上了顺便​​说ROW_NUMBER() OVER (PARTITION BY)一句，我仍在研究逻辑，目前在这个性能问题上这是不可能的。提前致谢..

编辑：我按照下面的建议修复了我的分区。

with initialSmas as
(
    select TradeDate, Symbol, Period, Value
    from tblDailySMA
),

smaComparisonsByPer as
(
    select i.TradeDate, i.Symbol, i.Period FastPer, i.Value FastVal, 
        i2.Period SlowPer, i2.Value SlowVal, (i.Value-i2.Value) FastMinusSlow
    from initialSmas i join initialSmas as i2 on i.Symbol = i2.Symbol 
        and i.TradeDate = i2.TradeDate and i2.Period > i.Period
),

smaComparisonsByPerPartitioned as
(
    select ROW_NUMBER() OVER (PARTITION BY sma.Symbol, sma.FastPer, sma.SlowPer
    ORDER BY sma.TradeDate) as RowNum, sma.TradeDate, sma.Symbol, sma.FastPer,
    sma.FastVal, sma.SlowPer, sma.SlowVal, sma.FastMinusSlow
    from smaComparisonsByPer sma
)

select scp.TradeDate as LatestDate, scp.FastPer, scp.FastVal, scp.SlowPer, scp.SlowVal,
    scp.FastMinusSlow, scp2.TradeDate as LatestDate, scp2.FastPer, scp2.FastVal, scp2.SlowPer, 
    scp2.SlowVal, scp2.FastMinusSlow, (scp.FastMinusSlow * scp2.FastMinusSlow) as Comparison
from smaComparisonsByPerPartitioned scp join smaComparisonsByPerPartitioned scp2
on scp.Symbol = scp2.Symbol and scp.RowNum = (scp2.RowNum - 1)