How to Generate a Temporary Date Table in SQL Server 2000 with Gaps in Data?

Generating Temporary Date Tables in SQL Server 2000

To create a temporary table filled with a range of dates in SQL Server 2000, an alternative approach is required when gaps exist in the available data. The following solution builds upon the question presented and provides a step-by-step guide for generating such a table.

Firstly, declare variables to hold the start and end dates:

declare $startDate set $startDate = select min(InsertDate) from customer
declare $endDate set $endDate = select max(InsertDate) from customer

Next, create a permanent table to hold all dates within the desired range:

CREATE TABLE #Dates (
  Month DATE,
  Trials INTEGER,
  Sales INTEGER
)

Now, populate the table using a WHILE loop that increments the date by one day until the end date is reached:

DECLARE @dIncr DATE = $startDate
DECLARE @dEnd DATE = $endDate

WHILE ( @dIncr < @dEnd )
BEGIN
  INSERT INTO #Dates (Month, Trials, Sales) VALUES(@dIncr, 0, 0)
  SELECT @dIncr = DATEADD(DAY, 1, @dIncr )
END

Finally, group the results by month and insert the placeholder values into the temporary table:

insert #dates
select dbo.FirstOfMonth(InsertDate) as Month, 0 as Trials, 0 as Sales
from customer
group by dbo.FirstOfMonth(InsertDate)

This solution allows for the creation of a temporary table filled with a range of dates, even when gaps exist in the original dataset.

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