我已经在其他帖子中搜索了我的问题，但没有任何效果。
我有一个包含客户的表和餐厅的营业额预测数据，计划值和实现值都在同一表中（必须与以前的数据库保持一致）。
我需要获得特定餐厅（站点）和特定活动（餐厅，外卖店，单击n收集）的最后一年的计划的预测和已实现的预测，以及日期范围（通常是一个月）的预测。
我的问题是，当计划的预测不存在并且实现的最后一年存在时，请求什么都不会返回。
这是我的要求：
SELECT
P.AFO_ACTIVITY_ID,
P.AFO_SITE_ID,
P.AFO_FORECAST_DATE,
P.AFO_SERVICE_ID,
P.AFO_PLANNED_CUSTOMERS,
P.AFO_REALIZED_CUSTOMERS,
P.AFO_GROUP_CUSTOMERS,
P.AFO_PLANNED_TURNOVER,
P.AFO_REALIZED_TURNOVER,
P.AFO_GROUP_TURNOVER,
P.AFO_NB_EMPLOYEES,
P.AFO_TURNOVER_EMPLOYEES,
P.AFO_ID,
p2.AFO_REALIZED_CUSTOMERS AS REAL_CUSTOMERS_PREVIOUS_YEAR,
p2.AFO_REALIZED_TURNOVER AS REAL_TURNOVER_PREVIOUS_YEAR
FROM
ACT_FORECAST P
LEFT OUTER JOIN
act_forecast p2 ON p2.AFO_FORECAST_DATE = p.AFO_FORECAST_DATE - 364
AND p2.AFO_SITE_ID = p.AFO_SITE_ID
AND p2.AFO_ACTIVITY_ID = p.AFO_ACTIVITY_ID
AND p2.AFO_SERVICE_ID = p.AFO_SERVICE_ID
WHERE
P.AFO_SITE_ID = :siteid
AND P.AFO_ACTIVITY_ID = :activityid
AND P.AFO_FORECAST_DATE BETWEEN :startdate AND :enddate
如果我播放2018年2月的请求，则会有我的数据（2018年和2017年）。
但是如果我在2019年2月玩的话我什么都没有，那对于今年的计划部分来说还可以，因为尚未完成预测，但对于上一年的部分，我应该有一些数据。
我也尝试了RIGHT OUTER JOIN，但是什么也没出现。
样本数据：
ActivityId SiteId ForecastDate ServiceId PlannedCustomers RealizedCustomers GroupCustomers PlannedTurnover RealizedTurnover GroupTurnover NbEmployeeMeal TurnoverEmployeeMeal ID RealizedCustomersPreviousYear RealizedTurnoverPreviousYear
1 58 01/02/18 1 0 0 0 0 11 0 0 11 2953773 0 39,85
1 58 01/02/18 3 345 398 0 3467,25 4052,01 0 0 0 2953774 328 3291,53
1 58 01/02/18 5 10 16 0 140 194,04 0 16 60,9 2953775 7 91,12
1 58 01/02/18 7 125 151 0 1200 1413,93 0 0 0 2953776 112 1063,89
有什么想法吗？
致谢
答案 0 :(得分：3)
您的where子句仅在您指定范围内的P中查找记录。如果没有，则没有源行可以离开自。
您可以通过内联视图或CTE生成您正在查看的时段内的所有可能日期，然后查找与任一日期集匹配的记录：
WITH CTE (this_year, last_year) AS (
SELECT :startdate + level - 1, :startdate + level - 365
FROM dual
CONNECT BY level <= :enddate - :startdate + 1
)
SELECT
:activityid AS AFO_ACTIVITY_ID,
:siteid AS AFO_SITE_ID,
CTE.this_year AS AFO_FORECAST_DATE,
P.AFO_SERVICE_ID,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_PLANNED_CUSTOMERS END) AS AFO_PLANNED_CUSTOMERS,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_REALIZED_CUSTOMERS END) AS AFO_REALIZED_CUSTOMERS,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_GROUP_CUSTOMERS END) AS AFO_GROUP_CUSTOMERS,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_PLANNED_TURNOVER END) AS AFO_PLANNED_TURNOVER,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_REALIZED_TURNOVER END) AS AFO_REALIZED_TURNOVER,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_GROUP_TURNOVER END) AS AFO_GROUP_TURNOVER,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_NB_EMPLOYEES END) AS AFO_NB_EMPLOYEES,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_TURNOVER_EMPLOYEES END) AS AFO_TURNOVER_EMPLOYEES,
MAX(CASE WHEN P.AFO_FORECAST_DATE = this_year
THEN P.AFO_ID END) AS AFO_ID,
MAX(CASE WHEN P.AFO_FORECAST_DATE = last_year
THEN P.AFO_REALIZED_CUSTOMERS END) AS REAL_CUSTOMERS_PREVIOUS_YEAR,
MAX(CASE WHEN P.AFO_FORECAST_DATE = last_year
THEN P.AFO_REALIZED_TURNOVER END) AS REAL_TURNOVER_PREVIOUS_YEAR
FROM
CTE
JOIN
ACT_FORECAST P
ON
P.AFO_FORECAST_DATE = CTE.this_year
OR
P.AFO_FORECAST_DATE = CTE.last_year
WHERE
P.AFO_SITE_ID = :siteid
AND P.AFO_ACTIVITY_ID = :activityid
GROUP BY
:activityid,
:siteid,
CTE.this_year,
P.AFO_SERVICE_ID;
而不是尝试外部联接（以任何方式），它都查找两个年份中的特定日期，并且执行一种手动枢轴操作以在右侧列中显示相关年份的值。请注意，最后两列的表达式使用last_year，其余的使用this_year（分组的表达式除外）。
对于SERVICE_ID，如果今年没有值，则可能希望合并以获取去年的值。如果您不想看到空值，也可以将其他值合并为零。
如果您不想使用WITH子句，则可以使用内联视图：
SELECT
...
FROM
(
SELECT :startdate + level - 1 AS this_year,
:startdate + level - 365 AS last_year
FROM dual
CONNECT BY level <= :enddate - :startdate + 1
) CTE
JOIN
ACT_FORECAST P
...
尽管您可能想要一个比CTE（使用任一版本...）更具描述性的名称
将示例数据作为CTE重做，对于未在问题中显示的值则为空：
with act_forecast (afo_activity_id, afo_site_id, afo_forecast_date, afo_service_id,
afo_planned_customers, afo_realized_customers, afo_group_customers,
afo_planned_turnover, afo_realized_turnover, afo_group_turnover,
afo_nb_employees, afo_turnover_employees, afo_id)
as (
select 1, 58, date '2018-02-01', 1, 0, 0, 0, 0, 11, 0, 0, 11, 2953773 from dual
union all select 1, 58, date '2017-02-02', 1, null, 0, null, null, 39.85, null, null, null, null from dual
union all select 1, 58, date '2018-02-01', 3, 345, 398, 0, 3467.25, 4052.01, 0, 0, 0, 2953774 from dual
union all select 1, 58, date '2017-02-02', 3, null, 328, null, null, 3291.53, null, null, null, null from dual
union all select 1, 58, date '2018-02-01', 5, 10, 16, 0, 140, 194.04, 0, 16, 60.9, 2953775 from dual
union all select 1, 58, date '2017-02-02', 5, null, 7, null, null, 91.12, null, null, null, null from dual
union all select 1, 58, date '2018-02-01', 7, 125, 151, 0, 1200, 1413.93, 0, 0, 0, 2953776 from dual
union all select 1, 58, date '2017-02-02', 7, null, 112, null, null, 1063.89, null, null, null, null from dual
)
然后在2018年给出的范围如下：
AFO_ACTIVITY_ID AFO_SITE_ID AFO_FORECA AFO_SERVICE_ID AFO_PLANNED_CUSTOMERS AFO_REALIZED_CUSTOMERS AFO_GROUP_CUSTOMERS AFO_PLANNED_TURNOVER AFO_REALIZED_TURNOVER AFO_GROUP_TURNOVER AFO_NB_EMPLOYEES AFO_TURNOVER_EMPLOYEES AFO_ID REAL_CUSTOMERS_PREVIOUS_YEAR REAL_TURNOVER_PREVIOUS_YEAR
--------------- ----------- ---------- -------------- --------------------- ---------------------- ------------------- -------------------- --------------------- ------------------ ---------------- ---------------------- ---------- ---------------------------- ---------------------------
1 58 2018-02-01 3 345 398 0 3467.25 4052.01 0 0 0 2953774 328 3291.53
1 58 2018-02-01 7 125 151 0 1200 1413.93 0 0 0 2953776 112 1063.89
1 58 2018-02-01 1 0 0 0 0 11 0 0 11 2953773 0 39.85
1 58 2018-02-01 5 10 16 0 140 194.04 0 16 60.9 2953775 7 91.12
，并在2019年提供以下范围：
AFO_ACTIVITY_ID AFO_SITE_ID AFO_FORECA AFO_SERVICE_ID AFO_PLANNED_CUSTOMERS AFO_REALIZED_CUSTOMERS AFO_GROUP_CUSTOMERS AFO_PLANNED_TURNOVER AFO_REALIZED_TURNOVER AFO_GROUP_TURNOVER AFO_NB_EMPLOYEES AFO_TURNOVER_EMPLOYEES AFO_ID REAL_CUSTOMERS_PREVIOUS_YEAR REAL_TURNOVER_PREVIOUS_YEAR
--------------- ----------- ---------- -------------- --------------------- ---------------------- ------------------- -------------------- --------------------- ------------------ ---------------- ---------------------- ---------- ---------------------------- ---------------------------
1 58 2019-01-31 3 398 4052.01
1 58 2019-01-31 5 16 194.04
1 58 2019-01-31 1 0 11
1 58 2019-01-31 7 151 1413.93
答案 1 :(得分：2)
如果我理解正确，则可以使用FULL OUTER JOIN：
SELECT
COALESCE(P.AFO_ACTIVITY_ID, P2.AFO_ACTIVITY_ID) as AFO_ACTIVITY_ID,
COALESCE(P.AFO_SITE_ID, P2.AFO_SITE_ID) as AFO_SITE_ID,
P.AFO_FORECAST_DATE,
P.AFO_SERVICE_ID,
P.AFO_PLANNED_CUSTOMERS,
P.AFO_REALIZED_CUSTOMERS,
P.AFO_GROUP_CUSTOMERS,
P.AFO_PLANNED_TURNOVER,
P.AFO_REALIZED_TURNOVER,
P.AFO_GROUP_TURNOVER,
P.AFO_NB_EMPLOYEES,
P.AFO_TURNOVER_EMPLOYEES,
P.AFO_ID,
p2.AFO_REALIZED_CUSTOMERS AS REAL_CUSTOMERS_PREVIOUS_YEAR,
p2.AFO_REALIZED_TURNOVER AS REAL_TURNOVER_PREVIOUS_YEAR
FROM (SELECT P.*
FROM ACT_FORECAST P
WHERE P.AFO_SITE_ID = :siteid AND
P.AFO_ACTIVITY_ID = :activityid AND
P.AFO_FORECAST_DATE BETWEEN :startdate AND :enddate
) P FULL JOIN
(SELECT p2.*
FROM act_forecast p2
WHERE P2.AFO_SITE_ID = :siteid AND
P2.AFO_ACTIVITY_ID = :activityid AND
P2.AFO_FORECAST_DATE BETWEEN :startdate - 364 AND :enddate - 364
) p2
ON p2.AFO_FORECAST_DATE = p.AFO_FORECAST_DATE - 364 AND
p2.AFO_SITE_ID = p.AFO_SITE_ID AND
p2.AFO_ACTIVITY_ID = p.AFO_ACTIVITY_ID AND
p2.AFO_SERVICE_ID = p.AFO_SERVICE_ID
答案 2 :(得分：0)
我很惊讶地看到- 364（我的专业知识可能少于您的专业知识）并且期望：
p.AFO_FORECAST_DATE - INTERVAL 364 DAY
也许这被解释为（微）秒？
（典型的调试方法是忽略掉AFO_FORECAST_DATE的部分条件。）
答案 3 :(得分：0)
使用类似下面的东西：
SELECT P.AFO_ACTIVITY_ID,
P.AFO_SITE_ID,
P.AFO_FORECAST_DATE,
P.AFO_SERVICE_ID,
P.AFO_PLANNED_CUSTOMERS,
P.AFO_REALIZED_CUSTOMERS,
P.AFO_GROUP_CUSTOMERS,
P.AFO_PLANNED_TURNOVER,
P.AFO_REALIZED_TURNOVER,
P.AFO_GROUP_TURNOVER,
P.AFO_NB_EMPLOYEES,
P.AFO_TURNOVER_EMPLOYEES,
P.AFO_ID,
p2.AFO_REALIZED_CUSTOMERS AS REAL_CUSTOMERS_PREVIOUS_YEAR,
p2.AFO_REALIZED_TURNOVER AS REAL_TURNOVER_PREVIOUS_YEAR
FROM ACT_FORECAST P
LEFT OUTER JOIN(SELECT DISTINCT p2.AFO_FORECAST_DATE
FROM ACT_FORECAST P2)
ON p2.AFO_FORECAST_DATE = p.AFO_FORECAST_DATE - 364
AND p2.AFO_SITE_ID = p.AFO_SITE_ID
AND p2.AFO_ACTIVITY_ID = p.AFO_ACTIVITY_ID
AND p2.AFO_SERVICE_ID = p.AFO_SERVICE_ID
WHERE
P.AFO_SITE_ID = :siteid
AND P.AFO_ACTIVITY_ID = :activityid
AND P.AFO_FORECAST_DATE BETWEEN :startdate AND :enddate