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Alex Rivera
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Postgres can round (truncate) timestamps using the date_trunc function, like this: date_trunc('hour', val) date_trunc('minute', val) I'm looking for a way to truncate a timestamp to the nearest 5-minute boundary so, for example, 14:26:57 becomes 14:25:00. The straightforward way to do it is like this: date_trunc('hour', val) + date_part('minute', val)::int / 5 * interval '5 min' Since this is a performance-critical part of the query, I'm wondering whether this is the fastest solution, or whether there's some shortcut (compatible with Postgres 8.1+) that I've overlooked.
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