Calendar table for Data Warehouse

问题

For my data warehouse, I am creating a calendar table as follows:

SET NOCOUNT ON

DROP Table dbo.Calendar
GO
Create Table dbo.Calendar
(
    CalendarId              Integer NOT NULL,
    DateValue               Date    NOT NULL,
    DayNumberOfWeek         Integer NOT NULL,
    NameOfDay               VarChar (10) NOT NULL,
    NameOfMonth             VarChar (10) NOT NULL,
    WeekOfYear              Integer NOT NULL,
    JulianDay               Integer NOT NULL,
    USAIsBankHoliday        Bit     NOT NULL,
    USADayName              VarChar (100) NULL,
)
ALTER TABLE dbo.Calendar ADD CONSTRAINT
    DF_Calendar_USAIsBankHoliday DEFAULT 0 FOR USAIsBankHoliday
GO
ALTER TABLE dbo.Calendar ADD CONSTRAINT
    DF_Calendar_USADayName DEFAULT '' FOR USADayName
GO

Declare @StartDate  DateTime = '01/01/2000'
Declare @EndDate    DateTime = '01/01/2020'

While @StartDate < @EndDate
Begin
    INSERT INTO dbo.Calendar 
    (
        CalendarId, 
        DateValue, 
        WeekOfYear,
        DayNumberOfWeek,
        NameOfDay,
        NameOfMonth,
        JulianDay
    )
    Values 
    (
        YEAR (@StartDate) * 10000 + MONTH (@StartDate) * 100 + Day (@StartDate), --CalendarId
        @StartDate,                 -- DateValue
        DATEPART (ww, @StartDate),  -- WeekOfYear
        DATEPART (dw, @StartDate),  -- DayNumberOfWeek
        DATENAME (dw, @StartDate),  -- NameOfDay
        DATENAME (M, @StartDate),   -- NameOfMonth
        DATEPART (dy, @StartDate)   -- JulianDay
    )

    Set @StartDate += 1
End

--=========================== Weekends
-- saturday and sunday
UPDATE dbo.Calendar SET USAIsBankHoliday = 1, USADayName += 'Weekend, ' WHERE DayNumberOfWeek IN (1, 7) 


--=========================== Bank Holidays
-- new years day
UPDATE dbo.Calendar SET USAIsBankHoliday = 1, USADayName += 'New Year''s Day, '  WHERE (CalendarId % 2000) IN (101)

-- memorial day (last Monday in May)
UPDATE dbo.Calendar 
SET USAIsBankHoliday = 1, 
    USADayName += 'Memorial Day, '  
WHERE 1=1
AND CalendarId IN 
    (
        SELECT MAX (CalendarId)
        FROM dbo.Calendar 
        WHERE MONTH (DateValue) = 5 
        AND DATEPART (DW, DateValue)=2
        GROUP BY YEAR (datevalue)
    )

-- independence day
UPDATE dbo.Calendar SET USAIsBankHoliday = 1, USADayName += 'Independence Day, '  WHERE (CalendarId % 2000) IN (704)

-- labor day (first Monday in September)
UPDATE dbo.Calendar 
SET USAIsBankHoliday = 1, 
    USADayName += 'Labor Day, '  
WHERE 1=1
AND CalendarId IN 
    (
        SELECT MIN (CalendarId)
        FROM dbo.Calendar 
        WHERE MONTH (DateValue) = 9
        AND DATEPART (DW, DateValue)=2
        GROUP BY YEAR (datevalue)
    )

-- thanksgiving day (fourth Thursday in November)
UPDATE dbo.Calendar 
SET USAIsBankHoliday = 1, 
    USADayName += 'Thanksgiving Day, '  
WHERE 1=1
AND CalendarId IN 
    (
        SELECT Max (CalendarId)-2
        FROM dbo.Calendar 
        WHERE MONTH (DateValue) = 11
        AND DATEPART (DW, DateValue)=7
        GROUP BY YEAR (datevalue)
    )

-- christmas
UPDATE dbo.Calendar SET USAIsBankHoliday = 1, USADayName += 'Christmas Day, '  WHERE (CalendarId % 2000) IN (1225)

--=========================== Other named days
-- new years eve
UPDATE dbo.Calendar SET USADayName += 'New Year''s Eve, '  WHERE (CalendarId % 2000) IN (1231)

-- black friday (day after thanksgiving day)
UPDATE dbo.Calendar SET USADayName += 'Black Friday, '  WHERE CalendarId IN (SELECT CalendarId+1 From dbo.Calendar Where USADayName like '%Thanksgiving%')

-- christmas eve
UPDATE dbo.Calendar SET USADayName += 'Christmas Eve, '  WHERE (CalendarId % 2000) IN (1224)

-- boxing day
UPDATE dbo.Calendar SET USADayName += 'Boxing Day, '  WHERE (CalendarId % 2000) IN (1226)

--=========================== Remove trailing comma
UPDATE dbo.Calendar SET USADayName = SubString (USADayName, 1, LEN (USADayName) -1) WHERE LEN (USADayName) > 2

SELECT * FROM dbo.Calendar

Here is the output of this command

I have seen similar structures implemented in various flavours by data architects.

My question is: What other data warehousing / dimension style useful information can I add to this table structure?

回答1:

Quarter
Year
Financial/Accounting Year
Financial/Accounting Quarter
isWeekend
isWeekday
isWorkDay
WeekId (weeks since start of year)
isLastDayofMonth
DaysSince (e.g. days since 1/1/2000)

回答2:

This is my list of possible columns in calendar dimension:

Key
Date
Is Yesterday
Is Today
Is Tomorrow
Day of Year
Day of Halfyear
Day of Quarter
Day of Month
Day of Week
Day of Week Short Name
Day of Week Short Name CS
Day of Week Long Name
Day of Week Long Name CS
Days in Week
Days in Month
Days in Quarter
Days in Halfyear
Days in Year
Reverse Day of Week
Reversse Day of Month
Reverse Day of Quarter
Reverse Day of Halfyear
Reverse Day of Year
Is Last 7 days
Is Last 14 days
Is Last 30 days
Is Last 90 Days
Is Last 180 Days
Is Last 365 Days
Is Weekday
Is Weekend
Workday of Week
Workday of Month
Workday of Quarter
Workday of Halfyear
Workday of Year
Reverse Workday of Week
Reverse Workday of Month
Reverse Workday of Quarter
Reverse Workday of Halfyear
Reverse Workday of Year
Workdays in Week
Workdays in Month
Workdays in Quarter
Workdays in Halfyear
Workdays in Year
Is Last Workday in Week
Is Last Workday in Month
Is Workday
Is Holiday
Is Future
Is Past
Is Previous Month
Is Current Month
Is Following Month
Is Month to Date
Is Beginning of Month
Is End of Month
Is Past Month
Beginning of Month
End of Month
Month Number
Month Name Long
Month Name Long CS
Month Name Short
Month Name Short CS
Month of Quarter
Month of Halfyear
Is Previous Week
Is Current Week
Is Following Week
Is Week to Date
Is Beginning of Week
Is End of Week
Is Past Week
Beginning of Week
End of Week
Week Number
Week Name Long
Week Name Short
Week of Month
Is Previous Quarter
Is Current Quarter
Is Following Quarter
Is Quarter to Date
Is Beginning of Quarter
Is End of Quarter
Is Past Quarter
Beginning of Quarter
End of Quarter
Quarter Number
Quarter Name Long
Quarter Name Long CS
Quarter Name Short
Is Previous Halfyear
Is Current Halfyear
Is Following Halfyear
Is Halfyear to Date
Is Beginning of Halfyear
Is End of Halfyear
Is Past Halfyear
Beginning of Halfyear
End of Halfyear
Halfyear Number
Halfyear Name Long
Halfyear Name Long CS
Halfyear Name Short
Is Previous Year
Is Current Year
Is Following Year
Is Year to Date
Is Beginning of Year
Is End of Year
Is Past Year
Beginning of Year
End of Year
Year Number
Year Name Long
Year Name Short
Year Quarter Text
Year Month Day
Year Halfyear
Year Quarter
Year Month
Year Day of Year
Is Leap Year
Distance in Days from Today
Distance in Working Days from Today
Distance in Calendar Weeks from Today
Distance in Calendar Months from Today
Distance in Calendar Quarters from Today
Distance in Calendar Halfyears from Today
Distance in Calendar Years from Today
Nth Day of Week in Month
Reverse Nth Day of Week in Month

I created interactive spreadsheet where you can create your own time dimension for PostgreSQL database.

回答3:

Well Raj More, Its a nice Post and very helpful script for Creating a calender, The Other fields which you can include in the same table may be- 1) QuateroftheYear 2) IsWeekend 3) IsWeekday

回答4:

quarter of year
year_quarter (2013-3)
month of year
year_month (2013-08)
week of year
week of month
day of year
day of quarter
day of month
day of week

来源：https://stackoverflow.com/questions/1201874/calendar-table-for-data-warehouse

标签

sql-server

data-warehouse