Manipulating report column based on another column value?

Here is what I am trying to do.
1.     I have a report region which has 2 columns.
2.     Both the columns are setup as links to navigate to a different page. I am using <img src="#IMAGE_PREFIX#e2.gif" alt="Edit"> for link text report item attribute.
3.     The value can be either in column 1 or 2 but not in both the columns at the same time.
4.     If the value is existing in column1, the column 2 should display as null, which I have trouble with. I can see the images even though the value is null.
Appreciate if you can let me know how to achieve this?
Edited by: user552288 on Jul 15, 2009 7:45 AM

Could you please post the current query which you are using?
Instead of using the image display attribute in the report attributes column, can you include that part of the query.
Something like:
select
(case when col1!=NULL then <img src="#IMAGE_PREFIX#e2.gif" alt="Edit">) else 'NULL' as Column1,
(case when col2!=NULL then <img src="#IMAGE_PREFIX#e2.gif" alt="Edit"> ) else 'NULL' as Column2
from table

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Manipulating report column based on another column value?

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