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date_trunc(field, timestamptz, zone_name) performs truncation using the named time zone as reference, rather than working in the session time zone as is the default behavior. It's equivalent to date_trunc(field, timestamptz at time zone zone_name) at time zone zone_name but it's faster, easier to type, and arguably easier to understand. Vik Fearing and Tom Lane Discussion: https://postgr.es/m/6249ffc4-2b22-4c1b-4e7d-7af84fedd7c6@2ndquadrant.com |
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