how to convert the range of number to the date

i have a query

the 2 parameters are p_numnber_from and p_number_to

and the numbers are 1=JAN
3 - MAR

so if the parameters are from P_number_from =1
p_number_to= 7

how to convert it in the below select statement

SELECT distinct l.ledger_id,
               m.segment2 legal_entity
          FROM apps.gl_code_combinations m,
               apps.gl_je_headers h,
               apps.gl_je_lines l
         WHERE     h.je_header_id = l.je_header_id
               AND m.code_combination_id = l.code_combination_id
               AND l.ledger_id = 2947
               AND h.period_name in  ( p_number_from, p_number_to)
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slightwv (䄆 Netminder) Commented:
You can convert the number to the month like the code below but I would suggest a CASE statement.

case p_number
   when 1 then 'JAN'
   when 1 then 'FEB'

From a number to a MON:
pardeshirahulAuthor Commented:
no my question is

if p_number_from =1

and p_number_to = 5

then the query will be

AND h.period_name in  ('JAN-13', 'FEB-13', 'MAR-13', 'APR-13', 'MAY-13')

if p_number_from =9
and p_number_to=10


AND h.period_name in  ('SEP-13', 'OCT-13)

thats what i meant

the period_name string
Alexander Eßer [Alex140181]Software DeveloperCommented:
You could write a function that converts the 2 input params or do a sub-select with listagg.
Are you familiar with those suggestions?!
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slightwv (䄆 Netminder) Commented:
Off the top of my head, try this:

where h.period_name in (
   select to_char(add_months(trunc(sysdate,'YYYY'),(p_number_from-1)+level-1),'MON-YY')
   from dual connect by level<=(p_number_to-p_number_from)+1

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Alexander Eßer [Alex140181]Software DeveloperCommented:
@slightwv: nice one *thumbs up*
slightwv (䄆 Netminder) Commented:
Thanks Alex.

I keep thinking there is an easier way...  I'm just not seeing it right now.
pardeshirahulAuthor Commented:
one more question you mentioned

 select to_char(add_months(trunc(sysdate,'YYYY'),(p_number_from-1)+level-1),'MON-YY')
   from dual connect by level<=(p_number_to-p_number_from)+1

but theere is one more parameter to it P_year

so if the year is 2013 then the above query id fine

if it is 2012


like can it be dynamic

i have a parameter p_year
slightwv (䄆 Netminder) Commented:
Again, I think I'm missing the 'easy' way but here is the one with p_year added:

select to_char(add_months(to_date('01' || to_char(p_year),'MMYYYY'),(p_number_from-1)+(level-1)),'MON-YY')
slightwv (䄆 Netminder) Commented:
Simplified slightly:
select to_char(to_date(to_char((level+p_number_from-1),'00') || to_char(p_year),'MMYYYY'),'MON-YY')
from dual connect by level<=(p_number_to-p_number_from)+1

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