MySQL select a row where datetime (epoch) over 20 minutes old

I have a column called datemade, it is stored in this type of format:
What i want to do is only selct rows that are over 20 minutes old?

FROM salestable
WHERE datemade +??

Then I'm stuck

Any suggestions please????
Tony PearceAsked:
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SELECT *, from_unixtime(datemane)
FROM salestable

with this you will get time in normal format
SELECT *, from_unixtime(datemane)
FROM salestable
WHERE unix_timestamp('yourtime')

better version sorry
Cornelia YoderArtistCommented:
You can select the unix epoch date directly, or formatted into a standard datetime (from_unixtime(datemade)) .

You can get the 20 minutes from adding a WHERE clause to your query:

SELECT * FROM salestable
WHERE SUBDATE(unix_timestamp(NOW()), INTERVAL 20 MINUTE) > datemade

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Tony PearceAuthor Commented:
Thanks very much, complete and accurate
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MySQL Server

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