帶時移的GROUP BY日期時間

Question

以下聲明爲我提供了按地點ID和工廠編號分組的每天的平均風速和總產量。

SELECT STE_ID, PNT_NO, T_SMP, AVG(AVR_WS), SUM(AVR_PW) FROM argosrecord GROUP BY STE_ID , PNT_NO , YEAR(T_SMP) , MONTH(T_SMP) , DAY(T_SMP) 

我想適應這個查詢計算至凌晨2點，而不是午夜的平均金額從凌晨2點到午夜。

Answer 1

select STE_ID, 
    PNT_NO, 
    YEAR(dateadd(hour, -2, T_SMP)) as Year, 
    MONTH(dateadd(hour, -2, T_SMP)) as Month, 
    DAY(dateadd(hour, -2, T_SMP)) as Day, 
    AVG(AVR_WS) as AVG_AVR_WS, 
    SUM(AVR_PW) as SUM_AVR_PW 
from argosrecord 
group by STE_ID, 
    PNT_NO, 
    YEAR(dateadd(hour, -2, T_SMP)), 
    MONTH(dateadd(hour, -2, T_SMP)), 
    DAY(dateadd(hour, -2, T_SMP)) 

對於使用MySQL的：

select 
    STE_ID, 
    PNT_NO, 
    T_SMP, 
    avg(AVR_WS), 
    sum(AVR_PW) 
FROM 
    argosrecord 
GROUP BY 
    STE_ID , 
    PNT_NO , 
    YEAR(DATE_ADD(T_SMP, INTERVAL -2 HOUR)) , 
    MONTH(DATE_ADD(T_SMP, INTERVAL -2 HOUR)) , 
    DAY(DATE_ADD(T_SMP, INTERVAL -2 HOUR))