Chart Query problem

Question

Hi all ,
I am a newbie to Oracle apex and have stuck in an issue . I am using this query for my Chart Source
select NULL link, count() Count VALUE , to_char((TRUNC(ORDER_DATE)),'Month') "Month"*
from  "HR"."OEHR_ORDERS"
group by to_char((TRUNC(ORDER_DATE)),'Month')
order by 1 desc
but it gives this error when i click next
1 error has occurred
Failed to parse SQL query!
select NULL link, count() Count VALUE , to_char((TRUNC(ORDER_DATE)),'Month') "Month" from "HR"."OEHR_ORDERS" group by to_char((TRUNC(ORDER_DATE)),'Month') order by 1 desc*
Certain queries can only be executed when running your application, if your query appears syntactically correct, you can save your query without validation (see options below query source).
what should i do and what am i doing wrong ? as this query gives the correct result if i run it in SQL window
thanks for the help in advance

Answer 1

In your first query, you gave the count(*) column two names COUNT and Value. That I think was your only mistake.
The column ordering might not matter if you only have one value column, but if you want a single chart query to represent more than one line, then the ordering matters.
In my application I use an Apex item to hold the entire query as text, including v(...) bindings, and displays 1 to 50 lines, dynamically depending on the number of value columns. The names of the lines are derived from the column names.
/kenny