我正在尝试建立一个表，按周汇总销售数据。在其中，我试图使相邻的列之一显示上一年同一财政周的销售数字（由于我所在组织的财政日历，去年有53周）。我还需要比较（比较单位/比较销售）与52周前的期间，这是完全不同的会计周（将2019年的第9周与2018年的第10周进行比较）。
我尝试同时使用联合和完全外部联接，但是考虑到我的数据的使用方式，它们效率很低（因为这是每周数据，所以联合最终效率低下，因为我需要省略日期信息初始查询，然后更新表中的列以反映数据所在的星期。这显然充满了出错的机会，但也耗时105次，或者根本没有用（尝试使用完整的外部联接返回所有列的错误答案）。我也尝试过使用CTE，但这对我也不起作用。我目前正在尝试使用CASE语句，但这也返回了空值。我不太确定下一步要去哪里
#STANDARDSQL
SELECT
DTL.SKU_NBR AS SKU_NBR
, SLS.STR_NBR AS STR_NBR
, CONCAT(TRIM(CAST(SKU_HIER.SKU_NBR AS STRING)), ' ', '-', ' ', TRIM(SKU_HIER.SKU_DESC)) AS SKU
, CONCAT(TRIM(CAST(SKU_HIER.EXT_SUB_CLASS_NBR AS STRING)), ' ', '-', ' ', TRIM(SKU_HIER.SUB_CLASS_DESC)) AS SUB_CLASS
, CONCAT(TRIM(CAST(SKU_HIER.EXT_SUB_SC_NBR AS STRING)), ' ', '-', ' ', TRIM(SKU_HIER.SUB_SC_DESC)) AS SUB_SUB_CLASS
, LOCATION.MKT_NM AS MARKET_NAME
, LOCATION.RGN_NM AS REGION_NAME
, LOCATION.DIV_NM AS DIVISION_NAME
, LOCATION.DIV_NBR AS DIVISION_NUMBER
, LOCATION.RGN_NBR AS REGION_NUMBER
, LOCATION.MKT_NBR AS MARKET_NUMBER
, COMP.STR_COMP_IND AS COMP_IND
, COMP.PY_STR_COMP_IND AS PRIOR_COMP_IND
, CALENDAR.FSCL_WK_DESC AS FISCAL_WEEK
, CALENDAR.FSCL_PRD_DESC AS FISCAL_PERIOD
, CALENDAR.FSCL_WK_END_DT AS END_DATE
, CALENDAR.FSCL_WK_BGN_DT AS BEGIN_DATE
, CALENDAR.FSCL_YR AS FISCAL_YEAR_NBR
, CALENDAR.FSCL_WK_NBR AS WEEK_NUMBER
, CALENDAR.FSCL_YR_WK_KEY_VAL AS FISCAL_KEY
, CALENDAR.LY_FYR_WK_KEY_VAL AS LY_FISCAL_KEY
, SUM(COALESCE(DTL.UNT_SLS,0)) AS UNITS
, SUM(COALESCE(DTL.EXT_RETL_AMT,0) + COALESCE(DTL.TOT_GDISC_DTL_AMT,0))
AS SALES
, SUM(CASE
WHEN 1=1 THEN (COALESCE(DTL.EXT_RETL_AMT,0) + COALESCE(DTL.TOT_GDISC_DTL_AMT,0)) * COMP.STR_COMP_IND
ELSE 0 END) AS COMP_SALES
, SUM(CASE
WHEN 1=1 THEN (COALESCE(DTL.UNT_SLS,0)) * COMP.STR_COMP_IND
ELSE 0 END) AS COMP_UNITS
, SUM(CASE
WHEN 1=1 AND SLS.SLS_DT = DATE_SUB(SLS.SLS_DT, INTERVAL 364 DAY)
THEN (COALESCE(DTL.EXT_RETL_AMT,0) +
COALESCE(DTL.TOT_GDISC_DTL_AMT,0)) * COMP.PY_STR_COMP_IND
ELSE NULL END)
AS LY_COMP_SALES
, SUM(CASE
WHEN 1=1 AND SLS.SLS_DT = DATE_SUB(SLS.SLS_DT, INTERVAL 364 DAY)
THEN (COALESCE(DTL.UNT_SLS,0)) * COMP.PY_STR_COMP_IND
ELSE NULL END)
AS LY_COMP_UNITS
, SUM(CASE
WHEN SLS.SLS_DT = DATE_SUB(SLS.SLS_DT, INTERVAL 371 DAY)
THEN (COALESCE(DTL.EXT_RETL_AMT,0) +
COALESCE(DTL.TOT_GDISC_DTL_AMT,0))
ELSE NULL END)
AS LY_SALES
, SUM(CASE
WHEN SLS.SLS_DT = DATE_SUB(SLS.SLS_DT, INTERVAL 371 DAY)
THEN (COALESCE(DTL.UNT_SLS,0))
ELSE NULL END)
AS LY_UNITS
FROM `pr-edw-views.SLS.POS_SLS_TRANS_DTL` AS SLS
INNER JOIN
UNNEST (SLS.DTL) AS DTL
JOIN `pr-edw-views.SHARED.MVNDR_HIER` AS MVNDR
ON DTL.DERIV_MVNDR.MVNDR_NBR = MVNDR.MVNDR_NBR
JOIN `pr-edw-views.SHARED.SKU_HIER_FD` AS SKU_HIER
ON SKU_HIER.SKU_NBR = DTL.SKU_NBR
AND SKU_HIER.SKU_CRT_DT = DTL.SKU_CRT_DT
JOIN `pr-edw-views.SHARED.LOC_HIER_FD` AS LOCATION
ON LOCATION.LOC_NBR = SLS.STR_NBR
JOIN `pr-edw-views.SHARED.CAL_PRD_HIER_FD` AS CALENDAR
ON CALENDAR.CAL_DT = SLS_DT
JOIN `pr-edw-views.SLS.STR_COMP_DAY` AS COMP
ON COMP.CAL_DT = CALENDAR.CAL_DT
AND COMP.STR_NBR = SLS.STR_NBR
WHERE CALENDAR.FSCL_WK_END_DT BETWEEN '2018-01-29' AND '2019-04-07'
AND SLS.SLS_DT BETWEEN '2018-01-29' AND '2019-04-07'
AND POS_TRANS_TYP_CD in ('S', 'R')
AND SKU_HIER.EXT_CLASS_NBR = '025-004'
AND MVNDR.MVNDR_NBR IN (74798, 60002238, 73059, 206820, 76009, 40263, 12879, 76722, 10830, 206823, 87752, 60052261, 70401, 51415, 51414)
AND SKU_HIER.LATEST_SKU_CRT_DT_FLG = TRUE
GROUP BY
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
我目前在LY_SALES，LY_UNITS，LY_COMP_SALES和LY_COMP_UNITS列中得到空值，尽管我知道应该有销售这些物品的地点与上一年同期相比。我想要达到的是使那些前一年的值显示在当前年值的旁边。任何帮助将不胜感激！
谢谢！
答案 0 :(得分：0)
此类条件永远无法满足：SLS.SLS_DT = DATE_SUB（SLS.SLS_DT，间隔371天）。仅仅是因为SLS_DT不等于SLS_DT-371。
您可以在CTE中预聚合表（将SLS_DT按列添加到组中），然后将CASE替换为对预聚合表的联接。瞄准这样的东西：它会变成这样的东西（注意-在这种情况下没有SUM）：
CASE WHEN AGGSLS.SLS_DT = DATE_SUB(SLS.SLS_DT, INTERVAL 371 DAY)
THEN (COALESCE(AGGSLS.SUM_EXT_RETL_AMT,0) +
COALESCE(AGGSLS.SUM_TOT_GDISC_DTL_AMT,0))
ELSE NULL END
答案 1 :(得分：0)
两件事：
1）WHEN 1=1可以简单地表示为WHEN TRUE，这样在不中断AND / OR链接的情况下更容易移动语句
2）获得去年的销售额。您可以从最终查询中省略年份，并使用where子句限制输出，也可以创建一个较小的表，该表具有今年的销售额，每周的去年销售额。
根据我的拙见，去年的Weeknum销售是最好的选择，因为您可以在其他地方使用它。但这与您的工作非常相似
它看起来像：
SELECT CALENDAR.FSCL_WK_DESC as week_num,
sum(case when year = year(current_date()) then (COALESCE(DTL.UNT_SLS,0)) * COMP.STR_COMP_IND else 0 end) as this_year
sum(case when year = year(current_date())-1 then (COALESCE(DTL.UNT_SLS,0)) * COMP.STR_COMP_IND else 0 end) as last_year
然后使用week_num
希望您发现它有用
干杯！