SEP 11 - SQL Report which shows when Computers were added and deleted

Hi,

I am struggling to find a T-SQL solution to determine when Computers were added and deleted.

Example of query:

SELECT
    [COMPUTER_NAME],
    dateadd(s,convert(bigint,TIME_STAMP)/1000,'01-01-1970 00:00:00') as CreatedDate,
    dateadd(s,convert(bigint,TIME_STAMP)/1000,'01-01-1970 00:00:00') as DeletedDate
  FROM [sem5].[sem5].[SEM_COMPUTER]
  where [DELETED] = 1

Any assistance will be greatly appreciated.