Is there a way to shorten this script? - sql

Question

Can anyone please help me figure out a more convenient and efficient (shortest) way of writing the below script? The reason I'm doing this is because I will end up using the script on SSRS.
On SSRS, there will be two parameters and both are set to take blank values.
If the user running SSRS indicated only the Starting date parameter, then my report should give any date >= the starting date.
If the user put dates on both #startingdate and #endingdate, my script will search only those that are between #startingdate and #endingdate.
Do you guys kinda get what I'm trying to accomplish? I have an SSRS report similar to this scenario but it's very cumbersome to update because if I update one of the statement, I would have to do it on the other ones. Also the script is big and repetitive because of this.
If you could help me figure out a better way to do shorten or make it less cumbersome to code, please let me know, thanks!
Below is a sample script that I use:
DECLARE #STARTINGDATE
DECLARE #ENDINGDATE
SET #STARTINGDATE = '10/01/2013'
SET #ENDINGDATE = '10/05/2013'
CASE
WHEN #STARTINGDATE <> '' AND #ENDINGDATE <> ''
SELECT * FROM SALESTABLE
WHERE SALESDATE BETWEEN #STARTINGDATE AND #ENDINGDATE
END
WHEN #STARTINGDATE = '' AND #ENDINGDATE = ''
SELECT * FROM SALESTABLE
END
WHEN #STARTING <> '' AND #ENDINGDATE = ''
SELECT * FROM SALESABLE
WHERE SALESDATE >= #STARTINGDATE
END
WHEN #ENDINGDATE <> '' AND #STARTINGDATE = ''
SELECT * FROM SALESABLE
WHERE SALESDATE <= #ENDINGDATE
END

Answer 1

what if u use IF ELSE Statement?
IF #STARTINGDATE IS NOT NULL AND #ENDINGDATE IS NULL
SELECT * FROM SALESTABLE WHERE SALESDATE >= CONVERT(DATE,#STARTINGDATE,103)
ELSE IF #STARTINGDATE IS NOT NULL AND #ENDINGDATE IS NOT NULL
SELECT * FROM SALESTABLE WHERE SALESDATE >= CONVERT(DATE,#STARTINGDATE,103)
AND SALESDATE<DATEADD(DAY,1,CONVERT(DATE,#ENDINGDATE,103))
ELSE
SELECT * FROM SALESTABLE
References http://sqlfiddle.com/#!3/783c03/12

Answer 2

You can try this if StartingDate and EnddingDate dates are string. Using StartingDate and EnddingDate as text you will loose the date picker functionality in SSRS. Anyway here is a method to shorten the above script
Select * FROM SalesTable
Where SalesDate between
CASE WHEN #StartingDate = '' THEN SalesDate ELSE #StartingDate END
AND CASE WHEN #EndingDate = '' THEN SalesDate ELSE #EndingDate END
Method 2
If StartingDate and Endding date are dateTime. Use this method:
FYI: SSRS doesn't allow Blank values for DateTime parameters. It only allows NULL.
First create two parameters StartingDate and EndingDate and check the Allow NULL value.
Your Dataset query will be something like this
SELECT * FROM SalesTable
Where (SalesDate IS NULL OR #StartingDate IS NULL)
OR (SalesDate between ISNULL(#StartingDate, SalesDate)
AND ISNULL(#EndingDate, SalesDate))
Assign you dataset parameters to report parameters
Now your are good to go.