Help with Case Usage or similar

Question

Has anybody tried using similar to below case usage in where clause. Is there any other way i can get this done.
To summarize the query, month starts from 7th of current month to 6th of next month. Query has to dynamically assume that. Please let me know.
Thanks ahead for assistance.
select * from table tc
where tc.column=x and
(case when (to_char(sysdate, 'DD')/7)>=1 THEN
trunc(tc.CREATED_DATE) between to_date('07-'||to_char(sysdate, 'MM-YYYY'), 'DD-MM-YYYY') and
to_date('06-'||to_char(add_months(sysdate, 1), 'MM-YYYY'), 'DD-MM-YYYY')
else
trunc(tc.CREATED_DATE) between to_date('07-'||to_char(add_months(sysdate, -1), 'MM-YYYY'), 'DD-MM-YYYY') and
to_date('06-'||to_char(sysdate, 'MM-YYYY'), 'DD-MM-YYYY')
END)

Answer 1

I missed a piece of the calculation. I tried the below query with Aug 6th and 7th. It should work for any day - including SYSDATE;
SQL> with tc as (
   select trunc(sysdate -60 + rownum) created_date
   from dual
   connect by rownum <= 100)  
select *
from tc
where created_date between trunc(to_date('06-AUG-07','DD-MON-YY')-6,'MM')+6
                       and trunc(add_months(to_date('06-AUG-07','DD-MON-YY')-6,1),'MM')+5
CREATED_DATE
07-JUL-07  
08-JUL-07  
05-AUG-07  
06-AUG-07  
31 rows selected.
SQL> with tc as (
   select trunc(sysdate -60 + rownum) created_date
   from dual
   connect by rownum <= 100)  
select *
from tc
where created_date between trunc(to_date('07-AUG-07','DD-MON-YY')-6,'MM')+6
                       and trunc(add_months(to_date('07-AUG-07','DD-MON-YY')-6,1),'MM')+5
CREATED_DATE
07-AUG-07  
08-AUG-07  
05-SEP-07  
06-SEP-07  
31 rows selected.