How to minus 6 hours from a timestamp?

Hi,

I have a need to minus 6 hours from a time stamp if the current timestamp is greater than the current time.

I have attached the script for you to see.

Not sure what I'm doing wrong here.

Any help would be much appreciated.

Regards

Ken
UPDATE SMSIN_copy
SET validDate = realdate - 6 hour
where realdate > CURRENT_TIMESTAMP()

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kenuk110Asked:
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miqrogrooveCommented:
Timestamps are expressed in seconds, so,

UPDATE SMSIN_copy
SET validDate = realdate - (6 * 60 * 60)
where realdate > CURRENT_TIMESTAMP()
0
HuyBDCommented:
try this
UPDATE SMSIN_copy
SET validDate = date_add(realdate,interval -6 hour)
where realdate > CURRENT_TIMESTAMP()

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kenuk110Author Commented:
Thanks for the quick response!

I ran the script but I get an odd output, below is just one of the results

realdate = 2008-10-21 12:30:43

but

validDate = 2008-10-21 10:14:43

Any ideas??

Thanks
0
kenuk110Author Commented:
Brilliant, works perfectly. Cheers.
0
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