返回计数为零的所有月份的零值

Question

这是我的查询：

SELECT STAFF.stf_first_name + '' + STAFF.stf_last_name As Name,
       DATENAME(month,RES_HAB_DATA.reshabdata_data_date) As Month,
       SUM(case when RES_HAB_DATA.reshabdata_duration > 0
                then (RES_HAB_DATA.reshabdata_duration/15) else 0 end) As ServiceDeliveryTime,
       MONTH(RES_HAB_DATA.reshabdata_data_date) As MonthNumber 
FROM RES_HAB_DATA
  JOIN RES_HAB ON RES_HAB_DATA.reshab_id = RES_HAB.reshab_id
  JOIN STAFF ON RES_HAB_DATA.staff_id = STAFF.stf_id
WHERE RES_HAB.serv_id = 30
  AND RES_HAB_DATA.reshabdata_data_date >= '1/1/2015'
GROUP BY STAFF.stf_last_name,
         STAFF.stf_first_name,
         DATENAME(month,RES_HAB_DATA.reshabdata_data_date),
         MONTH(RES_HAB_DATA.reshabdata_data_date)
ORDER BY MonthNumber

产生的结果集为：

Name                         Month      ServiceDeliveryTime     MonthNumber
----------------------------------------------------------------------------
mb                           January             52                 1
MikeCasey                    January             10                 1
MikeCasey                    February            4                  2
PrecisionCareSupport         February            0                  2
MikeCasey                    March               4                  3
PrecisionCareSupport         March               0                  3
MikeCasey                    April               8                  4
PrecisionCareSupport         April               0                  4
MikeCasey                    May                 16                 5
MikeCasey                    July                4                  7
PrecisionCareSupport         July                1                  7
PrecisionCareSupport         August              0                  8
MikeCasey                    September           10                 9
MikeCasey                    October             12                 10

我正在生成一个图表并希望为该图表生成系列，但该系列的形成方式应该是每个系列标签必须具有所有刻度值（如果缺少相应的月份，则为零）。简单来说，我希望结果集为：

Name                         Month      ServiceDeliveryTime     MonthNumber
----------------------------------------------------------------------------
mb                           January             52                 1
mb                           February            0                  2
mb                           March               0                  3
mb                           April               0                  4
-                              -                 0                  5

直到 12 月，客户 MikeCasey 的系列将持续到 12 月，依此类推...对于所有系列标签。如果该客户缺少任何刻度，则该月的值将为零。

我怎样才能产生这个结果集？我想要一些统一的解决方案，因为对于不同的图表可能会有很多这样的查询。

Answer 1

肖先生，试试这个

;WITH 
(SELECT STAFF.stf_first_name + '' + STAFF.stf_last_name As Name,
       DATENAME(month,RES_HAB_DATA.reshabdata_data_date) As Month,
       SUM(case when RES_HAB_DATA.reshabdata_duration > 0
            then (RES_HAB_DATA.reshabdata_duration/15) else 0 end) As ServiceDeliveryTime,
       MONTH(RES_HAB_DATA.reshabdata_data_date) As MonthNumber 
 FROM RES_HAB_DATA
  JOIN RES_HAB ON RES_HAB_DATA.reshab_id = RES_HAB.reshab_id
  JOIN STAFF ON RES_HAB_DATA.staff_id = STAFF.stf_id
WHERE RES_HAB.serv_id = 30
    AND RES_HAB_DATA.reshabdata_data_date >= '1/1/2015'
GROUP BY STAFF.stf_last_name,
     STAFF.stf_first_name,
     DATENAME(month,RES_HAB_DATA.reshabdata_data_date),
     MONTH(RES_HAB_DATA.reshabdata_data_date)
) AS mytable
SELECT 
    myTableName.Name
    ,mytableMonth.Month
    ,ISNULL(mytable.ServiceDeliveryTime,0)
    ,mutableMonth.MonthNumber
FROM
    (SELECT DISTINCT Name from mytable) mytableName
    CROSS JOIN (SELECT DISTINCT Month,MonthNumber FROM mytable) mytableMonth
    LEFT INNER JOIN mytable ON mytableName.Name = mytable.Name AND mytableMonth.Month = mytable.Month AND mytableMonthNumber = mytable.MonthNumber
ORDER BY mytableName.Name, mytableMonth.MonthNumber

我从您的数据中提取了所有不同的月份和名称，并进行了交叉连接。

Answer 2

;WITH mytable(Name,Month,ServiceDeliveryTime,MonthNumber) AS
(
SELECT STAFF.stf_first_name + '' + STAFF.stf_last_name As Name,
   DATENAME(month,RES_HAB_DATA.reshabdata_data_date) As Month,
   SUM(case when RES_HAB_DATA.reshabdata_duration > 0
        then (RES_HAB_DATA.reshabdata_duration/15) else 0 end) As ServiceDeliveryTime,
   MONTH(RES_HAB_DATA.reshabdata_data_date) As MonthNumber 
 FROM RES_HAB_DATA
JOIN RES_HAB ON RES_HAB_DATA.reshab_id = RES_HAB.reshab_id
JOIN STAFF ON RES_HAB_DATA.staff_id = STAFF.stf_id
WHERE RES_HAB.serv_id = 30
AND RES_HAB_DATA.reshabdata_data_date >= '1/1/2015'
GROUP BY STAFF.stf_last_name,
 STAFF.stf_first_name,
 DATENAME(month,RES_HAB_DATA.reshabdata_data_date),
 MONTH(RES_HAB_DATA.reshabdata_data_date)
) 
SELECT 
myTableName.Name
,mytableMonth.Month_Name
,ISNULL(mytable.ServiceDeliveryTime,0) as ServiceDeliveryTime
,mytableMonth.id
FROM
(SELECT DISTINCT Name from mytable) mytableName
CROSS JOIN (SELECT DISTINCT Month_Name,id FROM MyMonths)  mytableMonth
LEFT JOIN mytable ON mytableName.Name = mytable.Name AND mytableMonth.Month_Name = mytable.Month AND mytable.MonthNumber = mytable.MonthNumber
ORDER BY mytableName.Name, mytableMonth.id

MyMonths 表已创建，id 为 MonthNumber，Month_Name 为 Month。 干杯！