Need to show last time updated data on site

I need to shoe on my website date and time when is data last time updated. Does anybody know where to fin开发者_如何学JAVAd any good looking javascript code for this ?

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proof of concept

1. your DB table should have a column like this: last_update TIMESTAMP(8),
2. retrieve the last updated row with SELECT * FROM table ORDER BY last_update DESC LIMIT 1
3. make an AJAX request usign Javascript ( maybe using jQuery) and display it,

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for that you have to keep tracking your files when it would updates or store datetime in database. not other way to track.