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DateTimePart (NoSQL query)

  • บทความ

APPLIES TO: NoSQL

Returns the value of the specified date and time part for the provided date and time.

Syntax

DateTimePart(<date_time_part> , <date_time>)

Arguments

Description
date_time A Coordinated Universal Time (UTC) date and time string in the ISO 8601 format YYYY-MM-DDThh:mm:ss.fffffffZ.
date_time_part A string representing a part of an ISO 8601 date format specification. This part is used to indicate which aspect of the date to extract and return.

Note

For more information on the ISO 8601 format, see ISO 8601.

Return types

Returns a numeric value that is a positive integer.

Examples

The following example returns various parts of the date and time May 29, 2016 08:30 UTC.

SELECT VALUE {
    getYear: DateTimePart("yyyy", "2016-05-29T08:30:00.1301617"),
    getMonth: DateTimePart("mm", "2016-05-29T08:30:00.1301617"),
    getDay: DateTimePart("dd", "2016-05-29T08:30:00.1301617"),
    getHour: DateTimePart("hh", "2016-05-29T08:30:00.1301617"),
    getMinute: DateTimePart("mi", "2016-05-29T08:30:00.1301617"),
    getSecond: DateTimePart("ss", "2016-05-29T08:30:00.1301617"),
    getMillisecond: DateTimePart("ms", "2016-05-29T08:30:00.1301617"),
    getMicrosecond: DateTimePart("mcs", "2016-05-29T08:30:00.1301617"),
    getNanosecond: DateTimePart("ns", "2016-05-29T08:30:00.1301617")
}

[
  {
    "getYear": 2016,
    "getMonth": 5,
    "getDay": 29,
    "getHour": 8,
    "getMinute": 30,
    "getSecond": 0,
    "getMillisecond": 130,
    "getMicrosecond": 130161,
    "getNanosecond": 130161700
  }
]

Remarks

  • This function returns undefined for these reasons:
    • The specified date and time part is invalid.
    • The date and time isn't a valid ISO 8601 date and time string.
  • The ISO 8601 date format specifies valid date and time parts to use with this function: | | Format | | --- | --- | | Year | year, yyyy, yy | | Month | month, mm, m | | Day | day, dd, d | | Hour | hour, hh | | Minute | minute, mi, n | | Second | second, ss, s | | Millisecond | millisecond, ms | | Microsecond | microsecond, mcs | | Nanosecond | nanosecond, ns |
  • This function doesn't use the index.

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