"no data found" in SVG Line Chart

Question

Hello,
I have a problem with a SVG Line Chart!
I have multiple series in the Line Chart, which data is based on multiple select lists.
When I leave one select list blank, so that one line has no data, the "no data found" statement appears in the Chart.
But when I delete the "no data found" statement in the Series Attributes it would not be deleted. Nevertheless when I open the Series Attributes again the message is still there....
Does anybody have an idea how I van delete the "No Data found Message"???
Thanks,
Tim

Answer 1

Chris and Cristoph -
I have found that many times errors like this are caused by SQL statements that don't really address the business need or the requirements for the chart. Let me use a simple example:
SELECT d.dept_name  dept_name,
       sum(s.sales_total)  sales_total
FROM orders o, depts d
WHERE o.dept_id = d.dept_id
  AND o.time_frame = 'Q1'
GROUP BY dept_nameSeems simple enough. But what if this statement is run early during the Q1 timeframe and one dept hasn't made any sales yet? Well, they won't show up in the output of this statement. From a business perspective, you will want that dept to show on the report with a zero total sales. You don't want them excluded from the report. So how do we fix this?
There are several options.
One dirty way of solving this is putting in a dummy record for each dept into the orders table with a 0 sales_total value for each time unit. YUK! That has wrong written all over it!
We could use a different type of join. And then use NVL or a Case or IF statement to turn Null Values into 0.
SELECT d.dept_name dept_name,
       sum(nvl(s.sales_total,0))  sales_total
FROM  orders o RIGHT JOIN dept d ON d.dept_id = o.dept_id
WHERE o.time_frame = 'Q1'
GROUP BY dept_nameWe could also square our data sets and summarize with an inner select
SELECT dept_name dept_name,
       sum(sales_total) sales_total
FROM (
  SELECT d.dept_name ,
         sum(s.sales_total)  sales_total
  FROM orders o, dept d
  WHERE o.dept_id = d.dept_id
    AND o.time_frame = 'Q1'
  GROUP BY dept_name
  UNION ALL
  SELECT DISTINCT dept_name ,
         0 sales_total
  FROM dept
GROUP BY dept_nameThe final result is that every dept has a value. That is the key. This is how the chart expects the data and this is probably how your business expects the data.
Austin