Direction Needed: Storing calculated values from datagrid column in order to call values into graph

Question

Hi all,
I am new to Flex/Flash Builder, actionscript, and mxml, so please be kind.
I have developed a small program that has a component that displays a datagrid fed with information out of a mysql db via a php data services connection. Within that same component (page), I have a graph that charts the dates via a plot chart. I am interested in adding a line series to the graph, but the data I want to use is a calculated field in the datagrid which I used a custom lable function to derive and display. Can someone steer me to the correct method to store such values and how to call them into a chart?
Some addition information
Custom label function:
  /* Custom label function for the Delta1 column. Calculates the number of days between the planting date and 10% flower. */
                              private function calculateTo1stFlower(item:Object, column:GridColumn):String {
                                        var tempDate1:Date = new Date(item.dflower10 - item.dplanting);
                                        return Math.round((tempDate1.time / MS_PER_DAY) + 1).toString();
/* Number of milliseconds in a day. (1000 milliseconds per second * 60 seconds per minute * 60 minutes per hour * 24 hours per day) */
                              private const MS_PER_DAY:uint = 1000 * 60 * 60 * 24;
Within my spark datagrid
<s:GridColumn width="30" headerText="Δ1" labelFunction="calculateTo1stFlower" ></s:GridColumn>
I assume I need to store the array of values for this column and then chart the saved values as the xField within the LineSeries. Should I use a class based model?
The following link seemed like it may be an appropriate path; I am not sure though.
http://help.adobe.com/en_US/flex/using/WS2db454920e96a9e51e63e3d11c0bf69084-7b51.html
Thanks in advance for any support,
Matthew

Answer 1

Thanks for trying to post DDL, but you have no idea how to do a data model. You do not know that tables have to have keys, what ISO-11179 is, etc. 
You have a table that is supposed to model companies. Your singular names says that there is only one company!  There is no company identifier (the industry standard is the DUNS). A customer is not a company. We do not use numeric data types for identifiers;
do you do math on them? NO!  The attribute property comes after the attribute name (you never heard of ISO-11179). 
Think about how silly VARCHAR(1) is. 
CREATE TABLE Companies 
(company_duns CHAR(9) NOT NULL PRIMARY KEY, 
 company_name VARCHAR(30)NOIT NULL, 
 margin_oil INTEGER NOT NULL, 
 margin_hangar INTEGER NOT NULL, 
 margin_cleaning INTEGER NOT NULL);
INSERT INTO Companies
 VALUES (1, 'AviatKorea', 100, 125, 200), 
(2, 'AXHollande', 50, 40, 30), 
(3, 'BFXNorway', 60, 80, 600), 
(4, 'EEEFrance', 10, 25, 60);
CREATE TABLE Company_Tariffs
(company_duns INTEGER NOT NULL
   REFERENCES Companies(company_duns), 
 tariff_type CHAR(1) NOT NULL
    CHECK (tariff_type IN ('A','B','C','D'),
 PRIMARY KEY (company_duns, tariff_type));
INSERT INTO Company_Tariffs values (1, 'A'), (2, 'C'), (2, 'D'), (3, 'A'), (4, 'A'), (4, 'C'), (4, 'D')
SELECT * -- do not use * in production code
  FROM Companies AS C,
       Company_Tariffs AS T 
 WHERE C.company_duns = T.company_duns;
>> I would like something like with a computed column [ ] that retrieves the different contracts used: <<
You might but a SQL programmer would not. This violated First Normal Form. It is a display report and is done in the presentation layers. 
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL