用 MDX 创建时间命名集总结 SSAS

用 MDX 创建时间命名集总结 SSAS

在数据分析中，大多数分析都和时间有关。时间条件经常是反复使用的，如昨天、上周、最近三个月等等。

为了便于快速地进行时间筛选，可以在多维分析模型中，创建一个时间命名集。

 

创建时间命名集的首要问题是确定当前时间。

一种方法是判断度量值的非空

见下面的语句，通过 Not IsEmpty 进行判断。最后一个有度量值的定为昨天

CREATE DYNAMIC SET CURRENTCUBE.[过去一天]
 AS Tail(Filter([日期].[日期层次].[日期], Not IsEmpty([日期层次].CurrentMember)),1), DISPLAY_FOLDER = '命名集';  
CREATE DYNAMIC SET CURRENTCUBE.[过去三天]
 AS [过去一天].item(0).item(0).Lag(2) : [过去一天].item(0).item(0), DISPLAY_FOLDER = '命名集'; 

如果能保证每天都有数据，上述算法没有问题。

不过，现实中，因为种种原因可能造成数据延迟、数据丢失或者最后一天确实没有数据。
最后的非空数据不是最近的时间

这时，要用另外的方法计算当前时间。

首先使用 now() 生成一个成员
CREATE MEMBER CURRENTCUBE.[Measures].[TimeNow]
 AS now()

然后用 StrToMember、DateAdd、 Format 函数转换为时间成员

 CREATE DYNAMIC SET CURRENTCUBE.[今天]
 AS StrToMember(
       "[日期].[日期层次].[日期].&["
       + 
       Format(DateAdd('d',0,CDate(TimeNow)
   ),"yyyy-MM-dd") 
       +"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段'  ;  
CREATE DYNAMIC SET CURRENTCUBE.[昨天]
 AS StrToMember(
       "[日期].[日期层次].[日期].&["
       + 
       Format(DateAdd('d',-1,CDate(TimeNow)
   ),"yyyy-MM-dd") 
       +"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段'; 
CREATE DYNAMIC SET CURRENTCUBE.[前天]
 AS StrToMember(
       "[日期].[日期层次].[日期].&["
       + 
       Format(DateAdd('d',-2,CDate(TimeNow)
   ),"yyyy-MM-dd") 
       +"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段'  ;

月份的用DateAdd('m', ... 
时间集使用  ":" 、 StrToSet 生成

CREATE DYNAMIC SET CURRENTCUBE.[最近三个月]
 AS StrToSet(
       "[日期].[日期层次].[月份].&["
       + 
       Format(DateAdd('m',-3,CDate([TimeNow])
   ),"yyyy-MM-01") 
       +"T00:00:00]:[日期].[日期层次].[月份].&["
       + 
       Format(DateAdd('m',0,CDate([TimeNow])
   ),"yyyy-MM-01") 
       +"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段'  ;

季度的特殊一些，用了 datediff 和 dateadd 计算是哪个季度

CREATE DYNAMIC SET CURRENTCUBE.[最近三个季度]
 AS StrToSet(
"[日期].[日期层次].[季度].&["+
Format(dateadd('q',datediff('q','2000-01-01',[TimeNow])-3,'2000-01-01'),"yyyy-MM-01") +
"T00:00:00]:" +"[日期].[日期层次].[季度].&["+
Format(dateadd('q',datediff('q','2000-01-01',[TimeNow]),'2000-01-01'),"yyyy-MM-01") +
"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段'  ;

年的用 DateAdd('yyyy' ...

CREATE DYNAMIC SET CURRENTCUBE.[最近三年]
 AS StrToSet(
       "[日期].[日期层次].[年].&["
       + 
       Format(DateAdd('yyyy',-3,CDate([TimeNow])
   ),"yyyy-01-01") 
       +"T00:00:00]:[日期].[日期层次].[年].&["
       + 
       Format(DateAdd('yyyy',0,CDate([TimeNow])
   ),"yyyy-01-01") 
       +"T00:00:00]"
 ), DISPLAY_FOLDER = '时间段' 

 

 

附上 SQL Server 里，常见时间计算 Sql 语句

Year to Date

CASE WHEN Date BETWEEN DATEADD(yy, DATEDIFF(yy, 0, getdate()), 0) AND DATEADD(dd, - 1, GETDATE()) THEN 'YTD' ELSE 'N' END AS YTD

Month to Date

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, (DATEADD(dd, - 1, GETDATE()))), 0) AND DATEADD(dd, DATEDIFF(dd, 1, getdate()), 0) THEN 'MTD' ELSE 'N' END AS MTD

Prior Year to Date

CASE WHEN Date BETWEEN DATEADD(yy, DATEDIFF(yy, 0, (DATEADD(yy, DATEDIFF(yy, 0, getdate()), - 1))), 0) AND DATEADD(yy, - 1, (DATEADD(dd, - 1, GETDATE()))) 
                      THEN 'Prior YTD' ELSE 'N' END AS [Prior YTD]
Yesterday

CASE WHEN DATEADD(dd, DATEDIFF(dd, 1, getdate()), 0) = Date THEN 'Yesterday' ELSE 'N' END AS Yesterday,

Week to Date

CASE WHEN Date BETWEEN DATEADD(wk, DATEDIFF(wk, 0, getdate() - 1), - 1) AND DATEADD(dd, DATEDIFF(dd, 1, getdate()), 0) THEN 'WTD' ELSE 'N' END AS WTD,

Prior Month

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 1, (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Prior Month' ELSE 'N' END AS [Prior Month]

Prior Month -1

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 2,                      (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 1, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Prior Month -1' ELSE 'N' END AS [Prior Month -1]

Prior Month -2

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 3,                     (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 2, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Prior Month -2' ELSE 'N' END AS [Prior Month -2]

Last 12 Months

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 12,                      (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Last 12 Months' ELSE 'N' END AS [Last 12 Months]

Last Year MTD

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 12,                       (DATEADD(dd, - 1, GETDATE())))), 0) AND DATEADD(yy, - 1, (DATEADD(dd, DATEDIFF(dd, 1, getdate()), 0))) THEN 'Last Year MTD' ELSE 'N' END AS LastYearMTD

Prior Quarter

CASE WHEN Date BETWEEN DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd,                       - 1, getdate()) - 1, 0)) - 1, 0) AND DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)), - 1) THEN 'Prior Quarter' ELSE 'N' END AS PriorQuarter

Prior Quarter -1

CASE WHEN Date BETWEEN DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1,  getdate()) - 1, 0)) - 2, 0) AND DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 1, - 1) THEN 'Prior Quarter -1' ELSE 'N' END AS [PriorQuarter -1]

Prior Quarter -2

CASE WHEN Date BETWEEN DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 3, 0) AND DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 2, - 1) THEN 'Prior Quarter -2' ELSE 'N' END AS [PriorQuarter -2]

Prior Quarter -3

CASE WHEN Date BETWEEN DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 4, 0) AND DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 3, - 1) THEN 'Prior Quarter -3' ELSE 'N' END AS [PriorQuarter -3]

Last 9 Months

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 9,                    (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Last 9 Months' ELSE 'N' END AS [Last 9 Months]

Last 6 Months

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 6,                      (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Last 6 Months' ELSE 'N' END AS [Last 6 Months]

Last 3 Months

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 3,                       (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Last 3 Months' ELSE 'N' END AS [Last 3 Months]

Prior Quarter LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 1, 0))) AND DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)), - 1)))                       THEN 'Prior Quarter LY' ELSE 'N' END AS [PriorQuarter LY]

Prior Quarter -1 LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0,                       DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 2, 0))) AND DATEADD(yy, - 1, DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate())  - 1, 0)) - 1, - 1))) THEN 'Prior Quarter -1 LY' ELSE 'N' END AS [PriorQuarter -1 LY]

Prior Quarter -2 LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 3, 0))) AND DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 2, - 1))) THEN 'Prior Quarter -2 LY' ELSE 'N' END AS [PriorQuarter -2 LY]

Prior Quarter -3 LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 4, 0))) AND DATEADD(yy, - 1, (DATEADD(qq, DATEDIFF(qq, 0, DATEADD(dd, DATEDIFF(dd, - 1, getdate()) - 1, 0)) - 3, - 1))) THEN 'Prior Quarter -3 LY' ELSE 'N' END AS [PriorQuarter -3 LY]

Last 12 Months LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 12, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1,  (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1)))                       THEN 'Last 12 Months LY' ELSE 'N' END AS [Last 12 Months LY]

Last 9 Months LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0,                       DATEADD(mm, - 9, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0,                       GETDATE())))), - 1))) THEN 'Last 9 Months LY' ELSE 'N' END AS [Last 9 Months LY]

Last 6 Months LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 6, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1))) THEN 'Last 6 Months LY' ELSE 'N' END AS [Last 6 Months LY]

Last 3 Months LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 3, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0, GETDATE())))), - 1))) THEN 'Last 3 Months LY' ELSE 'N' END AS [Last 3 Months LY]

Prior Month -2 LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 3, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 2, (DATEADD(dd, 0, GETDATE())))), - 1))) THEN 'Prior Month -2 LY' ELSE 'N' END AS [Prior Month -2 LY]

Prior Month -1 LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 2, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 1, (DATEADD(dd, 0, GETDATE())))), - 1)))                       THEN 'Prior Month -1 LY' ELSE 'N' END AS [Prior Month -1 LY]

Prior Month LY

CASE WHEN Date BETWEEN DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0,                       DATEADD(mm, - 1, (DATEADD(dd, 0, GETDATE())))), 0))) AND DATEADD(yy, - 1, (DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 0, (DATEADD(dd, 0,                     GETDATE())))), - 1))) THEN 'Prior Month LY' ELSE 'N' END AS [Prior Month LY]

Last Year
CASE WHEN Date BETWEEN DATEADD(yy, DATEDIFF(yy, 0, getdate() - 1)  - 1, 0) AND DATEADD(yy, DATEDIFF(yy, 0, getdate() - 1), - 1) THEN 'Last Year' ELSE 'N' END AS [Last Year]

2 Years Ago

CASE WHEN Date BETWEEN DATEADD(yy, DATEDIFF(yy, 0, getdate() - 1) - 2, 0) AND DATEADD(yy, DATEDIFF(yy, 0, getdate() - 1) - 1, - 1) THEN '2 Years Ago' ELSE 'N' END AS [2 Years Ago]

Last 12 Months -1

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 13, (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, - 1, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Last 12 Months -1' ELSE 'N' END AS [Last 12 Months -1]

Current Month +1

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 1, (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 2, (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Current Month +1' ELSE 'N' END AS [Current Month +1]

Current Month +2

CASE WHEN Date BETWEEN DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 2, (DATEADD(dd, 0, GETDATE())))), 0) AND DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, 3,                       (DATEADD(dd, 0, GETDATE())))), - 1) THEN 'Current Month +2' ELSE 'N' END AS [Current Month +2]