Query return data between two fixed points in time.

I have a table with a datestamp column which indicates wheren the record was written to the database table.

I am trying to write a query that will return all records that are in a date range between 6am (today) and 6am (a week ago).

I understand how to do the date range part however unsure how to enforce the 6am condition.

The query needs to be able to be run without changing the query on a regular basis. I should be able to run the query at any time during the day and it should stick to return only records between 6am 7 days ago and 6am today.

i have written thusfar

SELECT xxxx.table
FROM table
WHERE to_date(reportdate,'DD/MM/YYYY')
BETWEEN to_date(sysdate-7,'DD/MM/YYYY')
AND to_date(reportdate,'DD/MM/YYYY')

Thankyou

SELECT xxxx.table
FROM table
WHERE reportdate
BETWEEN (trunc(sysdate) - 7 )+6/24
AND trunc(sysdate)+6/24

What about this?

Code:

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SELECT xxxx.table
  FROM table
 WHERE to_date(reportdate,'DD/MM/YYYY')
      BETWEEN TRUNC(sysdate) - 7 + 6/24
          AND to_date(reportdate,'DD/MM/YYYY') + 6/24;

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