Is there any way to avoid the top rows with NULL values that has one column value (One of the table Business Key) in Cognos report prompt values - sql

Question

Is there any way to avoid the top rows with NULL values that has one column value (One of the table Business Key) in Cognos report prompt values
When the user does not select any value in the value prompt (Cognos Report Portal) and clicks FINISH button, the results include the column (One of the Business Keys with Value) that has other columns with NULL values.
Its no different as selecting the whole table.
`Select * From InsuranceTable`
Is there a way in Cognos to avoid the first top 10 rows when the user opts not to select anything in the value prompt
Business_Sub_Division Business_Division_Name Claim_Handling_Unit
1 NULL Construction NULL
2 NULL Binding Operations NULL
3 NULL E&S Casualty NULL
4 NULL Executive Assurance NULL
5 NULL Facultative Reinsurance NULL
6 NULL Healthcare NULL
7 NULL Professional Liability NULL
8 NULL Open Brokerage NULL
9 NULL Property NULL
10 NULL Special Risks NULL
11 Asset Protection Executive Assurance Canada - Claims
12 Captive Agents Property Executive Assurance
13 Excess Casualty Healthcare Europe - Claims
14 Financial Institutions E&S Casualty Executive Assurance

Answer 1

I'm a little bit confused as to what you want to achieve. However, if you simply want to filter out the rows that have NULL for column 1 and column 2 even if the user doesn't pick a value from the prompt then your filter could look something like this (assuming that you are selecting Claim_Handling_Unit in the value prompt):
(?param? IS MISSING AND [Businss_Sub_Division] IS NOT NULL AND [Claim_Handling_Unit] IS NOT NULL)
OR
(?param? IS NOT MISSING AND [Claim_Handling_Unit] = ?param?)
You have two bits of logic, one where nothing is selected and the other where a value is selected. If nothing is chosen then we only select rows where both of the other two values are not null. The key is that the two conditions don't overlap. Either ?param? is missing or it is not missing.
You can also accomplish the same logic using IF...THEN like this:
IF (?param? IS MISSING)
THEN ([Businss_Sub_Division] IS NOT NULL AND [Claim_Handling_Unit] IS NOT NULL)
ELSE ([Claim_Handling_Unit] = ?param?)
..or with a CASE statement
CASE
WHEN (?param? IS MISSING) THEN ([Businss_Sub_Division] IS NOT NULL AND [Claim_Handling_Unit] IS NOT NULL)
ELSE ([Claim_Handling_Unit] = ?param?)
END