How to generate Calendar table in warehouse

[Marusyk]

I need to generate a Calendar table - it is a very simple task for regular SQL but I'm using Microsoft Fabric and I've tried so far many options, however no success due to Fabric SQL limitations.

My table is:

CREATE TABLE dbo.CalendarData
(
    DateValue DATE,
    Year INT,
    StartOfYear VARCHAR(20),
    EndOfYear VARCHAR(20),
    Month INT,
    StartOfMonth VARCHAR(20),
    EndOfMonth VARCHAR(20),
    DaysInMonth INT,
    Day INT,
    DayName VARCHAR(20),
    DayOfWeek INT,
    MonthName VARCHAR(20),
    Quarter INT,
    StartOfQuarter VARCHAR(20),
    EndOfQuarter VARCHAR(20)
);

Option 1: while loop says - Each SQL statement runs as an independent session. Session context does not persist across SQL statements. Learn more at https://learn.microsoft.com/en-us/fabric/data-warehouse/sql-query-editor#limitati

DECLARE @StartDate DATE = '2023-01-01';
DECLARE @EndDate DATE = '2023-01-31';
WHILE @StartDate <= @EndDate
BEGIN
  INSERT INTO dbo.CalendarData (
    Date, Year, StartOfYear, EndOfYear,
    Month, MonthName, StartOfMonth, EndOfMonth, DaysInMonth,
    Day, DayName, DayOfWeek,
    Quarter, StartOfQuarter, EndOfQuarter
  )
  VALUES (
    @StartDate, 
    YEAR(@StartDate), -- Year
    DATEFROMPARTS(YEAR(@StartDate), 1, 1), -- StartOfYear
    DATEFROMPARTS(YEAR(@StartDate), 12, 31), -- EndOfYear
    MONTH(@StartDate), -- Month
    DATEFROMPARTS(YEAR(@StartDate), MONTH(@StartDate), 1), -- StartOfMonth
    EOMONTH(@StartDate), -- EndOfMonth
    DAY(EOMONTH(@StartDate)), -- DaysInMonth
    DATENAME(MONTH, @StartDate), - MonthName
    DAY(@StartDate), -- Day
    DATENAME(WEEKDAY, @StartDate), -- DayName
    (DATEPART(weekday, @StartDate) + 5) % 7 + 1, -- DayOfWeek
    DATEPART(QUARTER, @StartDate), -- Quarter
    CAST(DATEADD(QUARTER, DATEDIFF(QUARTER, 0, @StartDate), 0) AS DATE), -- StartOfQuarter
    EOMONTH(DATEFROMPARTS(YEAR(@StartDate), DATEPART(QUARTER, @StartDate) * 3, 1)) -- EndOfQuarter
  );

  SET @StartDate = DATEADD(day, 1, @StartDate);
END;

Option 2:  CTE - The query references an object that is not supported in distributed processing mode

WITH Numbers AS (
    SELECT TOP (DATEDIFF(day, @startDate, @endDate) + 1) n = ROW_NUMBER() OVER (ORDER BY (SELECT NULL))
    FROM sys.all_columns
  )
  INSERT INTO dbo.Calendar (
    Date, Year, StartOfYear, EndOfYear,
    Month, MonthName, StartOfMonth, EndOfMonth, DaysInMonth,
    Day, DayName, DayOfWeek,
    Quarter, StartOfQuarter, EndOfQuarter
  )
  SELECT 
    DATEADD(day, n - 1, @startDate) AS Date
    , YEAR(DATEADD(day, n - 1, @startDate)) AS Year
    , DATEFROMPARTS(YEAR(DATEADD(day, n - 1, @startDate)), 1, 1) AS StartOfYear
    , DATEFROMPARTS(YEAR(DATEADD(day, n - 1, @startDate)), 12, 31) AS EndOfYear
    , MONTH(DATEADD(day, n - 1, @startDate)) AS Month
    , DATENAME(MONTH, DATEADD(day, n - 1, @startDate)) AS MonthName
    , DATEFROMPARTS(YEAR(DATEADD(day, n - 1, @startDate)), MONTH(DATEADD(day, n - 1, @startDate)), 1) AS StartOfMonth
    , EOMONTH(DATEADD(day, n - 1, @startDate)) AS EndOfMonth
    , DAY(EOMONTH(DATEADD(day, n - 1, @startDate))) AS DaysInMonth
    , DAY(DATEADD(day, n - 1, @startDate)) AS Day
    , DATENAME(WEEKDAY, DATEADD(day, n - 1, @startDate)) AS DayName
    , (DATEPART(weekday, DATEADD(day, n - 1, @startDate)) + 5) % 7 + 1 AS DayOfWeek
    , DATEPART(QUARTER, DATEADD(day, n - 1, @startDate)) AS Quarter
    , CAST(DATEADD(QUARTER, DATEDIFF(QUARTER, 0, DATEADD(day, n - 1, @startDate)), 0) AS DATE) AS StartOfQuarter
    , EOMONTH(DATEFROMPARTS(YEAR(DATEADD(day, n - 1, @startDate)), DATEPART(QUARTER, DATEADD(day, n - 1, @startDate)) * 3, 1)) EndOfQuarter
   FROM Numbers

Option 3: Insert from Table function - The query references an object that is not supported in distributed processing mode.

INSERT INTO dbo.Calendar (
    Date, Year, StartOfYear, EndOfYear,
    Month, MonthName, StartOfMonth, EndOfMonth, DaysInMonth,
    Day, DayName, DayOfWeek,
    Quarter, StartOfQuarter, EndOfQuarter
  )
  SELECT 
    dr.Date AS Date
    , YEAR(dr.Date) AS Year
    , DATEFROMPARTS(YEAR(dr.Date), 1, 1) AS StartOfYear
    , DATEFROMPARTS(YEAR(dr.Date), 12, 31) AS EndOfYear
    , MONTH(dr.Date) AS Month
    , DATENAME(MONTH, dr.Date) AS MonthName
    , DATEFROMPARTS(YEAR(dr.Date), MONTH(dr.Date), 1) AS StartOfMonth
    , EOMONTH(dr.Date) AS EndOfMonth
    , DAY(EOMONTH(dr.Date)) AS DaysInMonth
    , DAY(dr.Date) AS Day
    , DATENAME(WEEKDAY, dr.Date) AS DayName
    , (DATEPART(weekday, dr.Date) + 5) % 7 + 1 AS DayOfWeek
    , DATEPART(QUARTER, dr.Date) AS Quarter
    , CAST(DATEADD(QUARTER, DATEDIFF(QUARTER, 0, dr.Date), 0) AS DATE) AS StartOfQuarter
    , EOMONTH(DATEFROMPARTS(YEAR(dr.Date), DATEPART(QUARTER, dr.Date) * 3, 1)) EndOfQuarter
   FROM dbo.GenerateDateRange(@startDate, @endDate) AS dr;

 How to generate simple data for table in Fabric??

[AlexanderPowBI]

Hi,

I have used this as a base:
https://fabric.guru/comprehensive-date-dimension-table-for-power-bi-datasets-in-fabric
and made adjustments to fit my needs. Then I have created a view in my warehouse based on that table and further requirements. Maybe it can help you?

//Alexander

[Marusyk]

Thank you, it is very useful but I don't use Spark

[v-nikhilan-msft · Accepted solution]

Hi @Marusyk 
The first one works, it just had some syntax issues (Date instead of DateValue for the first field, a comment that a '-' instead of '--' and MonthName was in the wrong spot in the list of fields to insert into. Here is the updated script:

DECLARE @StartDate DATE = '2023-01-01';
DECLARE @EndDate DATE = '2023-01-31';
WHILE @StartDate <= @EndDate
BEGIN
  INSERT INTO dbo.CalendarData (
    DateValue, Year, StartOfYear, EndOfYear,
    Month, StartOfMonth, EndOfMonth, DaysInMonth, MonthName,
    Day, DayName, DayOfWeek,
    Quarter, StartOfQuarter, EndOfQuarter
  )
  VALUES (
    @StartDate,
    YEAR(@StartDate), -- Year
    DATEFROMPARTS(YEAR(@StartDate), 1, 1), -- StartOfYear
    DATEFROMPARTS(YEAR(@StartDate), 12, 31), -- EndOfYear
    MONTH(@StartDate), -- Month
    DATEFROMPARTS(YEAR(@StartDate), MONTH(@StartDate), 1), -- StartOfMonth
    EOMONTH(@StartDate), -- EndOfMonth
    DAY(EOMONTH(@StartDate)), -- DaysInMonth
    DATENAME(MONTH, @StartDate), -- MonthName
    DAY(@StartDate), -- Day
    DATENAME(WEEKDAY, @StartDate), -- DayName
    (DATEPART(weekday, @StartDate) + 5) % 7 + 1, -- DayOfWeek
    DATEPART(QUARTER, @StartDate), -- Quarter
    CAST(DATEADD(QUARTER, DATEDIFF(QUARTER, 0, @StartDate), 0) AS DATE), -- StartOfQuarter
    EOMONTH(DATEFROMPARTS(YEAR(@StartDate), DATEPART(QUARTER, @StartDate) * 3, 1)) -- EndOfQuarter
  );
 
  SET @StartDate = DATEADD(day, 1, @StartDate);
END;

I have created a repro for you:

Hope this helps. Please let me know if you have any further queries.

[v-nikhilan-msft]

Hi @Marusyk 
Glad that your query got resolved. Please continue using Fabric Community for any help regarding your queries.

[v-nikhilan-msft]

Hi @Marusyk 

Thanks for using Fabric Community. 
At this time, we are reaching out to the internal team to get some help on this. We will update you once we hear back from them.
Thanks