The form with two arguments is equivalent to the timestamp with time zone - interval operator.ĭate_subtract(' 00:00:00+01'::timestamptz, '1 day'::interval, 'Europe/Warsaw') → 22:00:00+00ĭate_trunc ( text, timestamp ) → timestamp Subtract an interval from a timestamp with time zone, computing times of day and daylight-savings adjustments according to the time zone named by the third argument, or the current TimeZone setting if that is omitted. Get interval subfield (equivalent to extract) see Section 9.9.1ĭate_part('month', interval '2 years 3 months') → 3ĭate_subtract ( timestamp with time zone, interval ) → timestamp with time zone Get timestamp subfield (equivalent to extract) see Section 9.9.1ĭate_part('hour', timestamp ' 20:38:40') → 20ĭate_part ( text, interval ) → double precision The form with two arguments is equivalent to the timestamp with time zone + interval operator.ĭate_add(' 00:00:00+02'::timestamptz, '1 day'::interval, 'Europe/Warsaw') → 23:00:00+00ĭate_bin ( interval, timestamp, timestamp ) → timestampīin input into specified interval aligned with specified origin see Section 9.9.3ĭate_bin('15 minutes', timestamp ' 20:38:40', timestamp ' 20:05:00') → 20:35:00ĭate_part ( text, timestamp ) → double precision Subtract argument from current_date (at midnight)Īge(timestamp '') → 62 years 6 mons 10 daysĬlock_timestamp ( ) → timestamp with time zoneĬurrent date and time (changes during statement execution) see Section 9.9.5Ĭurrent_time ( integer ) → time with time zoneĬurrent time of day, with limited precision see Section 9.9.5Ĭurrent_timestamp → timestamp with time zoneĬurrent date and time (start of current transaction) see Section 9.9.5Ĭurrent_timestamp ( integer ) → timestamp with time zoneĬurrent date and time (start of current transaction), with limited precision see Section 9.9.5ĭate_add ( timestamp with time zone, interval ) → timestamp with time zoneĪdd an interval to a timestamp with time zone, computing times of day and daylight-savings adjustments according to the time zone named by the third argument, or the current TimeZone setting if that is omitted. Subtract arguments, producing a “ symbolic” result that uses years and months, rather than just daysĪge(timestamp '', timestamp '') → 43 years 9 mons 27 days Subtract timestamps (converting 24-hour intervals into days, similarly to justify_hours()) Subtract dates, producing the number of days elapsed Also, the + and * operators come in commutative pairs (for example both date + integer and integer + date) we show only one of each such pair. For brevity, these variants are not shown separately. Similarly, a date value is assumed to represent midnight in the TimeZone zone when comparing it to a timestamp.Īll the functions and operators described below that take time or timestamp inputs actually come in two variants: one that takes time with time zone or timestamp with time zone, and one that takes time without time zone or timestamp without time zone.

When comparing a timestamp without time zone to a timestamp with time zone, the former value is assumed to be given in the time zone specified by the TimeZone configuration parameter, and is rotated to UTC for comparison to the latter value (which is already in UTC internally).

Dates and timestamps (with or without time zone) are all comparable, while times (with or without time zone) and intervals can only be compared to other values of the same data type.

In addition, the usual comparison operators shown in Table 9.1 are available for the date/time types. You should be familiar with the background information on date/time data types from Section 8.5. For formatting functions, refer to Section 9.8. Table 9.32 illustrates the behaviors of the basic arithmetic operators ( +, *, etc.). Table 9.33 shows the available functions for date/time value processing, with details appearing in the following subsections.

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