Customizing project status sql statement

Question

The sql below takes into account the max(EFFDT) and max(EFFSEQ) to determine the status of a project, it also takes into account all later EFFDTs that are after CLOSED status such as FINISHED (company doesnt want this) - so what i eventually have are blank statuses for most projects since the sql also nulls any values outside Approved, Closed or Open. I need help in customizing the sql to get a max(EFFDT) of a project when it is in either an APPROVED,OPEN OR CLOSED status only. Here is what i have so far - thanks
SELECT P.EFFDT AS EFFDT,
P.EFFSEQ AS EFFSEQ,
(CASE P.PROJECT_STATUS WHEN 'A' THEN 'APPROVED' WHEN 'C' THEN 'CLOSED' WHEN 'N' THEN 'OPEN' ELSE NULL END) AS PROJECT_STATUS,
P.PROJECT_PRIORITY AS PROJECT_PRIORITY,
P.BUSINESS_UNIT AS BUSINESS_UNIT,
P.PROJECT_ID AS PROJECT_ID
FROM PS_PROJECT_STATUS P
WHERE P.EFFDT =
(SELECT MAX(EFFDT)
FROM PS_PROJECT_STATUS P1
WHERE P1.BUSINESS_UNIT = P.BUSINESS_UNIT
AND P1.PROJECT_ID = P.PROJECT_ID
AND P1.EFFDT < '$$$SessStartTime'
GROUP BY P1.BUSINESS_UNIT,
P1.PROJECT_ID
AND P.EFFSEQ =
(SELECT MAX(EFFSEQ)
FROM PS_PROJECT_STATUS P2
WHERE P2.BUSINESS_UNIT = P.BUSINESS_UNIT
AND P2.PROJECT_ID = P.PROJECT_ID
GROUP BY P2.BUSINESS_UNIT,
P2.PROJECT_ID
)

Answer 1

Well I had to create a new connection when it kept throwing
the error that there was no connection. This is not all of my
database logic, the rest of it, such as the creation of the
database and tables, as well as all of the related insert
statements. How the database was created was this:
public function openDatabase():void
conn = new SQLConnection();
conn.addEventListener(SQLErrorEvent.ERROR, errorHandler);
var dbFile:File =
File.applicationStorageDirectory.resolvePath("MatMgr.db");
if(dbFile.exists)
conn.addEventListener(SQLEvent.OPEN, openHandler);
else
conn.addEventListener(SQLEvent.OPEN, createHandler);
conn.openAsync(dbFile);
Essentially if it doesn't already exist, it creates a new one
along with the tables whose logic I left out. While typing this, I
experimented and discovered how to fix my problem by doing this:
private function executeSQL(selectSQL:String):void
var dbFile:File =
File.applicationStorageDirectory.resolvePath("MatMgr.db");
selectStatement = new SQLStatement();
conn = new SQLConnection();
selectStatement.sqlConnection = conn;
conn.open(
dbFile);
selectStatement.addEventListener(SQLEvent.RESULT,
selectResult);
selectStatement.addEventListener(SQLErrorEvent.ERROR,
dataManager.errorHandler);
selectStatement.text = selectSQL;
selectStatement.execute();
Though nothing appeared in the datagrid, no errors were
thrown, and the fact that nothing was in the datagrid can be
attributed to nothing being in the table in question at the time of
this post. Thanks for your help, it's what inspired me to make the
needed code change.