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Convert datetime into hours


Below query returns if a backup hadn't occured in last 7 days. But my reuirement is to check for last 24 hours backup status. Please let me know, how to convert below query to check last 24 hours or 12 hours  or 6 hours back backup status.

SELECT  (SELECT   RTRIM(CONVERT(char(20), SERVERPROPERTY('machinename'))) + '_' + CONVERT(char(20), SERVERPROPERTY('instancename'))) as instance,
        sd.name as name,
        max(bs.backup_start_date) as last_backup,
        note = CASE
   WHEN max(bs.backup_start_date) < GETDATE() - 7 THEN 'ALERT'
   WHEN ISNULL(max(bs.backup_start_date),0) = 0 THEN 'ALERT'
   ELSE '---'
FROM    master..sysdatabases sd
        Left outer join msdb..backupset bs on rtrim(bs.database_name) = rtrim(sd.name)
        left outer JOIN msdb..backupmediafamily bmf ON bs.media_set_id = bmf.media_set_id
        WHERE sd.name NOT LIKE '%tempdb%'
Group by sd.name,
Order by sd.name,last_backup

Thanks in Advance.

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1 Solution
Kevin CrossChief Technology OfficerCommented:
You can use DATEADD(HH, -24, GETDATE()) to check 24 hours ago.
Kevin CrossChief Technology OfficerCommented:
And consequently, you can replace -24 with whatever amount of hours less or more than the passed in date you want to use. So for example, 12 hours ago is DATEADD(HH, -12, GETDATE()).
sg05121983Author Commented:
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