Date concatenation using MONTH and YEAR

Question

Env : Oracle Reports 9I.
I need to display reports based on dates.
If the user enters in one field 'SEP' and in another '2005',
how can I concatenate both the fields as one and then display
all results for SEP 2005?
The Table has a field called Eff_Date (of type Date)
and containing values:
Eff_Date
==============
01-09-05
02-09-05
04-09-05
05-09-05
My code is
SELECT col1,
       col2
FROM   TableA
Where  TRUNC(Eff_Date )=:MONTH  ?? PARAMETER: Here is the month : SEPT
and      TRUNC(Eff_date) =:YEAR     ?? PARAMETER: Here  is the Year : 2005I need to concatenate parameters MONTH and YEAR in one and then
display records for that month.
How can I write the SQL Query to concatenate MONTH and YEAR and
TRUNCATE the column eff_date?
Please help.

Answer 1

Env : ORACLE REPORTS 9I
I am passing 3 parameters to the report:
Parameters are of type CHAR
Report Parameters
Year / Month :   2005 / AUG
Effective Date :
The colunm in table is eff_date
eff_date
01/08/2005
02/08/2005
03/08/2005
15/09/2005
17/09/2005
18/09/2005
29/09/2005The problem is:
1)If I dont enter anything,I just get displayed 2 record for the above.
It should display all records rather than 2.
2)If I enter Effective date as 01-AUG-2005,no records are displayed.
This is my code:
Select col1,col2
from   TableA
where ( TRUNC(ch.eff_date) = nvl (:E_DATE, TRUNC(ch.eff_date) ) 
AND     TRUNC(ch.eff_date, 'MONTH') = nvl (TO_DATE(:YR||:MTH,                                                                                                          'yyyymon') ,
                                           TRUNC(ch.eff_date) )
      )Shud i change the AND to OR?