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Make a date now - franklinkelsey5 - 09-26-2025
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Article about make a date now:
Date/Time Functions and Operators
Make a date now. Table 9.33 shows the available functions for date/time value processing, with details appearing in the following subsections. Table 9.32 illustrates the behaviors of the basic
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Table 9.33 shows the available functions for date/time value processing, with details appearing in the following subsections. Table 9.32 illustrates the behaviors of the basic arithmetic operators ( + , * , etc.). For formatting functions, refer to Section 9.8. You should be familiar with the background information on date/time data types from Section 8.5. In addition, the usual comparison operators shown in Table 9.1 are available for the date/time types. 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. 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). Similarly, a date value is assumed to represent midnight in the TimeZone zone when comparing it to a timestamp. All 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 . For brevity, these variants are not shown separately. Also, the + and * operators come in commutative pairs (for example both date + integer and integer + date ), we show only one of each such pair. Table 9.32. Date/Time Operators. date + integer → date. Add a number of days to a date. date '2001-09-28' + 7 → 2001-10-05. date + interval → timestamp. Add an interval to a date. date '2001-09-28' + interval '1 hour' → 2001-09-28 01:00:00. date + time → timestamp. Add a time-of-day to a date. date '2001-09-28' + time '03:00' → 2001-09-28 03:00:00. interval + interval → interval. interval '1 day' + interval '1 hour' → 1 day 01:00:00. timestamp + interval → timestamp. Add an interval to a timestamp. timestamp '2001-09-28 01:00' + interval '23 hours' → 2001-09-29 00:00:00. time + interval → time. Add an interval to a time. time '01:00' + interval '3 hours' → 04:00:00. Negate an interval. - interval '23 hours' → -23:00:00. date - date → integer. Subtract dates, producing the number of days elapsed. date '2001-10-01' - date '2001-09-28' → 3. date - integer → date. Subtract a number of days from a date. date '2001-10-01' - 7 → 2001-09-24. date - interval → timestamp. Subtract an interval from a date. date '2001-09-28' - interval '1 hour' → 2001-09-27 23:00:00. time - time → interval. time '05:00' - time '03:00' → 02:00:00. time - interval → time. Subtract an interval from a time. time '05:00' - interval '2 hours' → 03:00:00. timestamp - interval → timestamp. Subtract an interval from a timestamp. timestamp '2001-09-28 23:00' - interval '23 hours' → 2001-09-28 00:00:00. interval - interval → interval. interval '1 day' - interval '1 hour' → 1 day -01:00:00. timestamp - timestamp → interval. Subtract timestamps (converting 24-hour intervals into days, similarly to justify_hours() ) timestamp '2001-09-29 03:00' - timestamp '2001-07-27 12:00' → 63 days 15:00:00. interval * double precision → interval. Multiply an interval by a scalar. interval '1 second' * 900 → 00:15:00. interval '1 day' * 21 → 21 days. interval '1 hour' * 3.5 → 03:30:00. interval / double precision → interval. Divide an interval by a scalar. interval '1 hour' / 1.5 → 00:40:00. Table 9.33. Date/Time Functions. age ( timestamp , timestamp ) → interval. Subtract arguments, producing a “ symbolic ” result that uses years and months, rather than just days. age(timestamp '2001-04-10', timestamp '1957-06-13') → 43 years 9 mons 27 days. age ( timestamp ) → interval. Subtract argument from current_date (at midnight) age(timestamp '1957-06-13') → 62 years 6 mons 10 days. clock_timestamp ( ) → timestamp with time zone. Current date and time (changes during statement execution), see Section 9.9.5. clock_timestamp() → 2019-12-23 14:39:53.662522-05. current_time → time with time zone. Current time of day, see Section 9.9.5. current_time ( integer ) → time with time zone. Current time of day, with limited precision, see Section 9.9.5. current_timestamp → timestamp with time zone. Current date and time (start of current transaction), see Section 9.9.5. current_timestamp → 2019-12-23 14:39:53.662522-05. current_timestamp ( integer ) → timestamp with time zone. Current date and time (start of current transaction), with limited precision, see Section 9.9.5. current_timestamp(0) → 2019-12-23 14:39:53-05. date_add ( timestamp with time zone , interval [ , text ] ) → timestamp with time zone. Add 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. The form with two arguments is equivalent to the timestamp with time zone + interval operator. date_add('2021-10-31 00:00:00+02'::timestamptz, '1 day'::interval, 'Europe/Warsaw') → 2021-10-31 23:00:00+00. date_bin ( interval , timestamp , timestamp ) → timestamp. Bin input into specified interval aligned with specified origin, see Section 9.9.3. date_bin('15 minutes', timestamp '2001-02-16 20:38:40', timestamp '2001-02-16 20:05:00') → 2001-02-16 20:35:00. date_part ( text , timestamp ) → double precision. Get timestamp subfield (equivalent to extract ), see Section 9.9.1.
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