SQL query- Power query BI help

[shavish]

I have following query with 5 parameters. When i select all 5 parameters, i see the entry is shown in Power BI desktop. If any of the selection is missing, the values aren't shown.

My requirement: On Default, i want to show the entire table and upon any parameter selection, respective entry shall be shown. Can anyone help?

The parameters are: Confidential_Flag , Doc_Name, Doc_Desc , Category and Usage

SELECT DISTINCT

Document.Name as Name

Document.Desc as Description

Document.Category as Category

Document.Usage as Usage

Document.No_of_pages as No_of_Pages

Document.Author_name as Author

Document.Confidential as Confidential

FROM

         (SELECT

                      tblProperty.Name as Name

                      tblProperty.Desc as Description

                      tblProperty.Category as Category

                      tblPropertyument.Usage as Usage

                      tblProperty.No_of_pages as No_of_Pages

                      tblProperty.Author_name as Author

                      tblProperty.Confidential as Confidential

            FROM

                     Docsdb.dbo.tblProperty tblProperty

            )Document_

WHERE

            (CASE WHEN (('" &Confidential_Flag &"'='1') AND (Document.Confidential='1')) THEN '1' WHEN(('" &Confidential_Flag &"='0' AND Document.Confidential='0' THEN '0')

            AND ('" &Doc_Name &"' is NULL OR Document.Name IN ('" &Doc_Name &"'))

            AND ('" &Doc_Desc &"' is NULL OR Document.Desc IN ('" &Doc_Desc &"'))

            AND ('" &Category&"' is NULL OR Document.Category IN ('" &Category&"'))

           AND ('" &Usage&"' is NULL OR Document.Usage IN ('" &Usage&"'))

[V-yubandi-msft]

Hi @shavish ,

Has your issue been resolved, or do you require any further information? Your feedback is valuable to us. If the solution was effective, please mark it as 'Accepted Solution' to assist other community members experiencing the same issue.

[V-yubandi-msft]

Hi @shavish ,

May I ask if you have resolved this issue? If so, please mark the helpful reply and accept it as the solution. This will be helpful for other community members who have similar problems to solve it faster.

Thank you.

[V-yubandi-msft]

Hi @shavish ,

We noticed we haven't received a response from you yet, so we wanted to follow up and ensure the solution we provided addressed your issue. If you require any further assistance or have additional questions, please let us know.

Your feedback is valuable to us, and we look forward to hearing from you soon.

Thanks..

[V-yubandi-msft]

Hi @shavish ,

Thank you for the update. It's encouraging to know your query works in SQL. However, Power BI may handle parameter filtering differently. The solution provided by @johnbasha33 , ensures that when parameters are not selected, all records are displayed rather than filtered out. Please try this fix in Power BI and inform us if you encounter any issues.

Thank you for your responses @johnbasha33 & @Deku .

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.

[Deku · Accepted solution]

SELECT DISTINCT
Name,
Desc as Description,
Category,
Usage,
No_of_Pages,
Author,
Confidential
FROM Docsdb.dbo.tblProperty
WHERE
   (CASE 
       WHEN '" & Confidential_Flag &"'='1' AND Confidential='1' THEN 1
       WHEN '" & Confidential_Flag &"='0' AND Confidential='0' THEN 0
    )
    AND ('" & Doc_Name &"' = '' OR Name     = '" &Doc_Name &"')
    AND ('" & Doc_Desc &"' = '' OR Desc     = '" &Doc_Desc &"')
    AND ('" & Category &"' = '' OR Category = '" &Category&"')
    AND ('" & Usage    &"' = '' OR Usage    = '" &Usage&"')

You were wrapping the catergories in '' so blanks would of always been empty strings. Try the above

[shavish]

@johnbasha33 My query worked on SQL, FYI. I will try your solution.

[johnbasha33]

@shavish 
Your issue is caused by how the WHERE clause is structured. The current logic requires all parameters to be selected for the query to return results. You need to modify it so that when parameters are NULL, the query returns all records.
Use ISNULL() or COALESCE() to ensure that when a parameter is not provided, it does not filter the results.

Fixed SQL Query:
SELECT DISTINCT
Document.Name AS Name,
Document.Desc AS Description,
Document.Category AS Category,
Document.Usage AS Usage,
Document.No_of_pages AS No_of_Pages,
Document.Author_name AS Author,
Document.Confidential AS Confidential
FROM Docsdb.dbo.tblProperty AS Document
WHERE
(ISNULL(@Confidential_Flag, '') = '' OR Document.Confidential = @Confidential_Flag)
AND (ISNULL(@Doc_Name, '') = '' OR Document.Name IN (SELECT value FROM STRING_SPLIT(@Doc_Name, ',')))
AND (ISNULL(@Doc_Desc, '') = '' OR Document.Desc IN (SELECT value FROM STRING_SPLIT(@Doc_Desc, ',')))
AND (ISNULL(@Category, '') = '' OR Document.Category IN (SELECT value FROM STRING_SPLIT(@Category, ',')))
AND (ISNULL(@Usage, '') = '' OR Document.Usage IN (SELECT value FROM STRING_SPLIT(@Usage, ',')));

Did I answer your question? Mark my post as a solution! Appreciate your Kudos !!