Change color of column background when entire column meets a condition

Question

I'm trying to create a report that visually indicates staffing coverage during certain hours. The report has the hours of the day as column headers, and for each person-row, a column can contain a 0 if that person is not scheduled for that hour, a 1 if one person is scheduled for that hour, or 2 if 2 people are scheduled for that hour, etc.<p>
What I need is to show gaps in coverage, so I need to color red those columns where there are 0's for all rows in that particular column.<p>
thanks!

Answer 1

Couldn't you do this in the report SQL itself<BR><BR>The problem I see with this is that based on what she's asking (i.e. all rows in that column must be zero), you will not know if a column should be marked in red until after all of the rows have been retrieved and displayed. To do what you suggest, you'd have to run the report once to find columns that sum to zero, i.e.:<BR><BR>
SELECT SUM(col1), sum(col2)...<BR>
INTO v_sum_col1, v_sum_col2...<BR><BR>
Then for any column with a sum of zero -- add in the code you suggest into the second SELECT to return the data, possibly with a DECODE twist:
DECODE(v_sum_col1, 0, '&lt;span style="background-color:pink"&gt;0&lt;/span&gt;', col1)