neo4j使用详解（六、cypher即时时间函数语法——最全参考）

2024-04-02 05:12
文章标签 函数 使用 详解 语法 时间 neo4j 参考 最全 即时 cypher

本文主要是介绍neo4j使用详解（六、cypher即时时间函数语法——最全参考），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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Neo4j系列导航：
neo4j及简单实践
cypher语法基础
cypher插入语法
cypher插入语法
cypher查询语法
cypher通用语法
cypher函数语法

6.时间函数-即时类型

表示具体的时刻的时间类型函数

6.1.date函数

年-月-日时间函数： yyyy-mm-dd

6.1.1.获取date

  • date()： 获取当前时间，如果未指定时区参数，则将使用本地时区 date([{timezone}])

    return date() as currentDate // 返回值2024-04-01
    return date({timezone: 'America/Los Angeles'}) // 返回值2024-04-01

  • date.transaction()： 使用transaction时返回当前date。对于同一事务中的每次调用，该值都是相同的 date.transaction([{timezone}])

    return date.transaction() as currentDate // 返回值2024-04-01

  • date.statement()： 使用statement返回当前date值。对于同一语句中的每次调用，该值都相同。但是，同一事务中的不同语句可能会产生不同的值 date.statement([{timezone}])

    return date.statement() as currentDate // 返回值2024-04-01

  • date.realtime()： 使用date返回当前值realtime。该值将是系统的实时时钟。 （系统时间）date.realtime([{timezone}])

    return date.realtime() as currentDate // 返回值2024-04-01

6.1.2.创建date

  • 创建 年-月-日： 返回一个date值，其中包含指定的年、月、日 date({year [, month, day]})

    unwind [date({year: 1984, month: 10, day: 11}),date({year: 1984, month: 10}),date({year: 1984})] as theDate return theDate // 返回值1984-10-11, 1984-10-01, 1984-01-01

  • 创建 年-周-日： date({year [, week, dayOfWeek]})

    unwind [date({year: 1984, week: 10, dayOfWeek: 3}), date({year: 1984, week: 10}),date({year: 1984})] as theDate return theDate // 返回值1984-03-07, 1984-03-05, 1984-01-01

  • 创建 年-季度-日： date({year [, quarter, dayOfQuarter]})

    unwind [date({year: 1984, quarter: 3, dayOfQuarter:45}),date({year: 1984, quarter: 3}),date({year: 1984})] as theDate return theDate // 返回值1984-08-14, 1984-07-01, 1984-01-01

  • 创建 年-日： date({year [, ordinalDay]})

    unwind [date({year: 1984, ordinalDay: 202}),date({year: 1984})] AS theDate return theDate // 返回值1984-07-20, 1984-01-01

  • 创建 根据时间字符串： date(temporalValue)

    unwind [date('2015-07-21'),date('2015-07'),date('201507'),date('2015-W30-2'),date('2015202'),date('2015')] as theDate return theDate // 返回值2015-07-21, 2015-07-01, 2015-07-01, 2015-07-21, 2015-07-21, 2015-01-01

  • 创建 使用其他时间组件： date({date [, year, month, day, week, dayOfWeek, quarter, dayOfQuarter, ordinalDay]})

    unwind [ date({year: 1984, month: 11, day: 11}), localdatetime({year: 1984, month: 11, day: 11, hour: 12, minute: 31, second: 14}), datetime({year: 1984, month: 11, day: 11, hour: 12, timezone: '+01:00'}) ] as dd return date({date: dd}) as dateOnly, date({date: dd, day: 28}) as dateDay

6.1.3.分割date

返回date通过在指定组件边界（由作为参数传递给函数的截断单元表示）处最近的先前时间点处截断指定瞬时瞬时值而获得的值。
date.truncate(unit [, temporalInstantValue [, mapOfComponents ] ])

参数含义
unit计算结果为以下string值之一的字符串表达式：'millennium', 'century', 'decade', 'year', 'weekYear', 'quarter', 'month', 'week', 'day'
temporalInstantValue以下类型之一的表达式：ZONED DATETIME, LOCAL DATETIME, DATE
mapOfComponents计算包含小于 的分量的映射的表达式unit

实例：

with datetime({year: 2017, month: 11, day: 11,hour: 12, minute: 31, second: 14, nanosecond: 645876123,timezone: '+01:00'}) as dreturndate.truncate('millennium', d) as truncMillenium,date.truncate('century', d) as truncCentury,date.truncate('decade', d) AS truncDecade,date.truncate('year', d, {day: 5}) AS truncYear,date.truncate('weekYear', d) as truncWeekYear,date.truncate('quarter', d) as truncQuarter,date.truncate('month', d) as truncMonth,date.truncate('week', d, {dayOfWeek: 2}) as truncWeek,date.truncate('day', d) as truncDay

结果：

千禧年节截断世纪截断十年截断年份截断周年截断季度截断月份截断周截断日
2000-01-012000-01-012010-01-012017-01-052017-01-022017-10-012017-11-012017-11-072017-11-11

6.2.datetime函数

年-月-日 时:分:秒:毫秒时间函数：yyyy-mm-ddThh:MM:SS:sssZ

6.2.1.获取datetime

  • datetime(): datetime([{timezone}])

    return datetime() //2024-04-01T10:02:28.192Z
    return datetime({timezone: 'America/Los Angeles'}) // 2024-04-01T03:02:28.238-07:00[America/Los_Angeles]

  • datetime.transaction(): datetime.transaction([{timezone}])

    return datetime.transaction() //2024-04-01T18:02:28.290Z
    RETURN datetime.transaction('America/Los Angeles') //2024-04-01T03:02:28.338-07:00[America/Los_Angeles]

  • datetime.statement(): datetime.statement([{timezone}])

    return datetime.statement() //2024-04-01T10:02:28.395Z

  • datetime.realtime(): datetime.realtime([{timezone}])

    return datetime.realtime() //2024-04-01T10:02:28.494444Z

6.2.2.创建datatime时间

datetime()返回一个带时区的datetime值，其中包含指定的年、月、日、时、分、秒、毫秒、微秒、纳秒和时区组件值。

  • 创建 年-月-日 时:分:秒： datetime({year [, month, day, hour, minute, second, millisecond, microsecond, nanosecond, timezone]})
    实例：

    unwind[datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, second: 14, millisecond: 123, microsecond: 456, nanosecond: 789}),datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, second: 14, millisecond: 645, timezone: '+01:00'}),datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, second: 14, nanosecond: 645876123, timezone: 'Europe/Stockholm'}),datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, second: 14, timezone: '+01:00'}),datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, second: 14}),datetime({year: 1984, month: 10, day: 11, hour: 12, minute: 31, timezone: 'Europe/Stockholm'}),datetime({year: 1984, month: 10, day: 11, hour: 12, timezone: '+01:00'}),datetime({year: 1984, month: 10, day: 11, timezone: 'Europe/Stockholm'})
] as theDate return theDate

    结果：

    返回值
    1984-10-11T12:31:14.123456789Z
    1984-10-11T12:31:14.645+01:00
    1984-10-11T12:31:14.645876123+01:00[Europe/Stockholm]
    1984-10-11T12:31:14+01:00
    1984-10-11T12:31:14Z
    1984-10-11T12:31+01:00[Europe/Stockholm]
    1984-10-11T12:00+01:00
    1984-10-11T00:00+01:00[Europe/Stockholm]

  • 创建 年-周-日： datetime({year [, week, dayOfWeek, hour, minute, second, millisecond, microsecond, nanosecond, timezone]})
    实例：

    unwind[datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, minute: 31, second: 14, millisecond: 645}),datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, minute: 31, second: 14, microsecond: 645876, timezone: '+01:00'}),datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, minute: 31, second: 14, nanosecond: 645876123, timezone: 'Europe/Stockholm'}),datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, minute: 31, second: 14, timezone: 'Europe/Stockholm'}),datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, minute: 31, second: 14}),datetime({year: 1984, week: 10, dayOfWeek: 3, hour: 12, timezone: '+01:00'}),datetime({year: 1984, week: 10, dayOfWeek: 3, timezone: 'Europe/Stockholm'})
] as theDate return theDate

    结果：

    返回值
    1984-03-07T12:31:14.645Z
    1984-03-07T12:31:14.645876+01:00
    1984-03-07T12:31:14.645876123+01:00[Europe/Stockholm]
    1984-03-07T12:31:14+01:00[Europe/Stockholm]
    1984-03-07T12:31:14Z
    1984-03-07T12:00+01:00
    1984-03-07T00:00+01:00[Europe/Stockholm]

  • 创建 年-季度-日： datetime({year [, quarter, dayOfQuarter, hour, minute, second, millisecond, microsecond, nanosecond, timezone]})
    实例：

    unwind[datetime({year: 1984, quarter: 3, dayOfQuarter: 45, hour: 12, minute: 31, second: 14, microsecond: 645876}),datetime({year: 1984, quarter: 3, dayOfQuarter: 45, hour: 12, minute: 31, second: 14, timezone: '+01:00'}),datetime({year: 1984, quarter: 3, dayOfQuarter: 45, hour: 12, timezone: 'Europe/Stockholm'}),datetime({year: 1984, quarter: 3, dayOfQuarter: 45})
] as theDate return theDate

    结果：

    返回值
    1984-08-14T12:31:14.645876Z
    1984-08-14T12:31:14+01:00
    1984-08-14T12:00+02:00[Europe/Stockholm]
    1984-08-14T00:00Z

  • 创建 年-日： datetime({year [, ordinalDay, hour, minute, second, millisecond, microsecond, nanosecond, timezone]})
    实例：

    unwind[datetime({year: 1984, ordinalDay: 202, hour: 12, minute: 31, second: 14, millisecond: 645}),datetime({year: 1984, ordinalDay: 202, hour: 12, minute: 31, second: 14, timezone: '+01:00'}),datetime({year: 1984, ordinalDay: 202, timezone: 'Europe/Stockholm'}),datetime({year: 1984, ordinalDay: 202})
] as theDate return theDate

    结果：

    返回值
    1984-07-20T12:31:14.645Z
    1984-07-20T12:31:14+01:00
    1984-07-20T00:00+02:00[Europe/Stockholm]
    1984-07-20T00:00Z

  • 创建 根据时间字符串: datetime(temporalValue)
    实例：

    unwind[datetime('2015-07-21T21:40:32.142+0100'),datetime('2015-W30-2T214032.142Z'),datetime('2015T214032-0100'),datetime('20150721T21:40-01:30'),datetime('2015-W30T2140-02'),datetime('2015202T21+18:00'),datetime('2015-07-21T21:40:32.142[Europe/London]'),datetime('2015-07-21T21:40:32.142-04[America/New_York]')
] as theDate return theDate

    结果：

    返回值
    2015-07-21T21:40:32.142+01:00
    2015-07-21T21:40:32.142Z
    2015-01-01T21:40:32-01:00
    2015-07-21T21:40-01:30
    2015-07-20T21:40-02:00
    2015-07-21T21:00+18:00
    2015-07-21T21:40:32.142+01:00[Europe/London]
    2015-07-21T21:40:32.142-04:00[America/New_York]

  • 创建 使用其他时间组件：
    datetime({datetime [, year, ..., timezone]}) | datetime({date [, year, ..., timezone]}) | datetime({time [, year, ..., timezone]}) | datetime({date, time [, year, ..., timezone]})
    实例：

    with date({year: 1984, month: 10, day: 11}) as dd
return
datetime({date: dd, hour: 10, minute: 10, second: 10}) as dateHHMMSS,
datetime({date: dd, hour: 10, minute: 10, second: 10, timezone:'+05:00'}) as dateHHMMSSTimezone,
datetime({date: dd, day: 28, hour: 10, minute: 10, second: 10}) as dateDDHHMMSS,
datetime({date: dd, day: 28, hour: 10, minute: 10, second: 10, timezone:'Pacific/Honolulu'}) as dateDDHHMMSSTimezone

    结果：

    dateHHMMSSdateHHMMSSTimezonedateDDHHMMSSdateDDHHMMSSTimezone
    1984-10-11T10:10:10Z1984-10-11T10:10:10+05:001984-10-28T10:10:10Z1984-10-28T10:10:10-10:00[Pacific/Honolulu]

  • 创建 根据时间戳： datetime({ epochSeconds | epochMillis })

    return datetime({epochSeconds: timestamp() / 1000, nanosecond: 23}) //2022-06-14T10:02:30.000000023Z
    return datetime({epochMillis: 424797300000}) //1983-06-18T15:15Z

6.2.3.分割datetime

返回datetime通过在指定组件边界（由作为参数传递给函数的截断单元表示）处最近的先前时间点处截断指定瞬时值而获得的值。
datetime.truncate(unit [, temporalInstantValue [, mapOfComponents ] ])

参数含义
unit求值为以下字符串之一的字符串表达式:‘millennium’、‘century’、‘decade’、‘year’、‘weekYear’、‘quarter’、‘month’、‘week’、‘day’、‘hour’、‘minute’、‘second’、‘millisecond’、‘microsecond’。
temporalInstantValue以下类型之一的表达式：ZONED DATETIME, LOCAL DATETIME, DATE
mapOfComponents求值为包含小于单位的组件的映射的表达式。在截断期间，可以使用键时区附加或覆盖时区。

实例：

withdatetime({year:2017, month:11, day:11,hour:12, minute:31, second:14, nanosecond: 645876123,timezone: '+03:00'}) AS d
returndatetime.truncate('millennium', d, {timezone: 'Europe/Stockholm'}) as truncMillenium,datetime.truncate('year', d, {day: 5}) as truncYear,datetime.truncate('month', d) as truncMonth,datetime.truncate('day', d, {millisecond: 2}) as truncDay,datetime.truncate('hour', d) as truncHour,datetime.truncate('second', d) as truncSecond

结果：

truncMilleniumtruncYeartruncMonthtruncDaytruncHourtruncSecond
2000-01-01T00:00+01:00[Europe/Stockholm]2017-01-05T00:00+03:002017-11-01T00:00+03:002017-11-11T00:00:00.002+03:002017-11-11T12:00+03:002017-11-11T12:31:14+03:00

6.3.localdatetime函数

年-月-日 时:分:秒:毫秒时间函数：yyyy-mm-ddThh:MM:SS:sss

6.3.1.获取localdatetime

  • localdatetime(): localdatetime([{timezone}])

    return localdatetime() //2024-04-01T10:02:30.447
    return localdatetime({timezone: 'America/Los Angeles'}) // 2024-04-01T03:02:30.482

  • localdatetime.transaction(): localdatetime.transaction([{timezone}])

    return localdatetime.transaction() //2024-04-01T10:02:30.532

  • localdatetime.statement(): localdatetime.statement([{timezone}])

    return localdatetime.statement() //2024-04-01T10:02:30.570

  • localdatetime.realtime(): localdatetime.realtime([{timezone}])

    return localdatetime.realtime() //2024-04-01T10:02:30.647817
    return localdatetime.realtime('America/Los Angeles') //2024-04-01T03:02:30.691099

6.3.2.创建localdatetime

  • 创建 年-月-日:
    localdatetime({year [, month, day, hour, minute, second, millisecond, microsecond, nanosecond]})

    return localdatetime({year: 1984, month: 10, day: 11,hour: 12, minute: 31, second: 14, millisecond: 123, microsecond: 456, nanosecond: 789}) as theDate
    返回值
    1984-10-11T12:31:14.123456789

  • 创建 年-周-日:
    localdatetime({year [, week, dayOfWeek, hour, minute, second, millisecond, microsecond, nanosecond]})

    return
localdatetime({year: 1984, week: 10, dayOfWeek: 3,hour: 12, minute: 31, second: 14, millisecond: 645
}) as theDate
    返回值
    1984-03-07T12:31:14.645

  • 创建 年-季-日:
    localdatetime({year [, quarter, dayOfQuarter, hour, minute, second, millisecond, microsecond, nanosecond]})

    return
localdatetime({
year: 1984, quarter: 3, dayOfQuarter: 45,
hour: 12, minute: 31, second: 14, nanosecond: 645876123
}) as theDate
    返回值
    1984-08-14T12:31:14.645876123

  • 创建 年-日:
    localdatetime({year [, ordinalDay, hour, minute, second, millisecond, microsecond, nanosecond]})

    return
localdatetime({
year: 1984, ordinalDay: 202,
hour: 12, minute: 31, second: 14, microsecond: 645876
}) as theDate
    返回值
    1984-07-20T12:31:14.645876

  • 创建 时间格式字符串: localdatetime(temporalValue)

    unwind [localdatetime('2015-07-21T21:40:32.142'),localdatetime('2015-W30-2T214032.142'),localdatetime('2015-202T21:40:32'),localdatetime('2015202T21')] as theDate
return theDate
    返回值
    2015-07-21T21:40:32.142
    2015-07-21T21:40:32.142
    2015-07-21T21:40:32
    2015-07-21T21:00

  • 创建 使用其他时间组件：
    localdatetime({datetime [, year, ..., nanosecond]}) | localdatetime({date [, year, ..., nanosecond]}) | localdatetime({time [, year, ..., nanosecond]}) | localdatetime({date, time [, year, ..., nanosecond]})
    实例1：

    with date({year: 1984, month: 10, day: 11}) as dd
returnlocaldatetime({date: dd, hour: 10, minute: 10, second: 10}) as dateHHMMSS,localdatetime({date: dd, day: 28, hour: 10, minute: 10, second: 10}) as dateDDHHMMSS
    dateHHMMSSdateDDHHMMSS
    1984-10-11T10:10:101984-10-28T10:10:10

    实例2：

    WITHdatetime({year: 1984, month: 10, day: 11,hour: 12,timezone: '+01:00'}) as dd
returnlocaldatetime({datetime: dd}) as dateTime,localdatetime({datetime: dd, day: 28, second: 42}) as dateTimeDDSS
    dateTimedateTimeDDSS
    1984-10-11T12:001984-10-28T12:00:42

6.3.3.分割localdatetime

localdatetime.truncate(unit [, temporalInstantValue [, mapOfComponents ] ])
实例：

withlocaldatetime({year: 2017, month: 11, day: 11,hour: 12, minute: 31, second: 14, nanosecond: 645876123}) as d
returnlocaldatetime.truncate('millennium', d) as truncMillenium,localdatetime.truncate('year', d, {day: 2}) as truncYear,localdatetime.truncate('month', d) as truncMonth,localdatetime.truncate('day', d) as truncDay,localdatetime.truncate('hour', d, {nanosecond: 2}) as truncHour,localdatetime.truncate('second', d) as truncSecond
truncMilleniumtruncYeartruncMonthtruncDaytruncHourtruncSecond
2000-01-01T00:002017-01-02T00:002017-11-01T00:002017-11-11T00:002017-11-11T12:00:00.0000000022017-11-11T12:31:14

6.4.localtime函数

时:分:秒:毫秒时间函数：hh:MM:SS.sss

6.4.1.获取localtime

  • localtime(): localtime([{timezone}])

    return localtime() //10:02:30.447
    return localtime({timezone: 'America/Los Angeles'}) // 03:02:30.482

  • localtime.transaction(): localtime.transaction([{timezone}])

    return localtime.transaction() //10:02:30.532

  • localtime.statement(): localtime.statement([{timezone}])

    return localtime.statement() //10:02:30.570

  • localtime.realtime(): localtime.realtime([{timezone}])

    return localtime.realtime() //10:02:30.647817
    return localtime.realtime('America/Los Angeles') //03:02:30.691099

6.4.2.创建localtime

  • 创建localtime:
    localtime({hour [, minute, second, millisecond, microsecond, nanosecond]})

    unwind[localtime({hour: 12, minute: 31, second: 14, nanosecond: 789, millisecond: 123, microsecond: 456}),localtime({hour: 12, minute: 31, second: 14}),localtime({hour: 12})
] as theTime
return theTime
    返回值
    12:31:14.123456789
    12:31:14
    12:00

  • 创建 根据Time格式字符串: localtime(temporalValue)

    unwind[localtime('21:40:32.142'),localtime('214032.142'),localtime('21:40'),localtime('21')
] as theTime
return theTime
    返回值
    21:40:32.142
    21:40:32.142
    21:40
    21:00

  • 创建 使用其他时间组件： localtime({time [, hour, ..., nanosecond]})
    实例：

    with time({hour: 12, minute: 31, second: 14, microsecond: 645876, timezone: '+01:00'}) as tt
returnlocaltime({time: tt}) as timeOnly,localtime({time: tt, second: 42}) as timeSS
    timeOnlytimeSS
    12:31:14.64587612:31:42.645876

6.4.3.分割localime

localtime.truncate(unit [, temporalInstantValue [, mapOfComponents ] ])
实例：

with time({hour: 12, minute: 31, second: 14, nanosecond: 645876123, timezone: '-01:00'}) as t
returnlocaltime.truncate('day', t) as truncDay,localtime.truncate('hour', t) as truncHour,localtime.truncate('minute', t, {millisecond: 2}) as truncMinute,localtime.truncate('second', t) as truncSecond,localtime.truncate('millisecond', t) as truncMillisecond,localtime.truncate('microsecond', t) as truncMicrosecond
truncDaytruncHourtruncMinutetruncSecondtruncMillisecondtruncMicrosecond
00:00:0012:00:0012:31:00.00200000012:31:1412:31:14.64500000012:31:14.645876000

6.5.time函数

时:分:秒:毫秒时间函数：hh:MM:SS.sssZ

6.4.1.获取time

  • time(): time([{timezone}])

    return time() //10:02:30.447
    return time({timezone: 'America/Los Angeles'}) // 03:02:32.351-07:00

  • time.transaction(): localtime.transaction([{timezone}])

    return time.transaction() //10:02:30.532Z

  • time.statement(): localtime.statement([{timezone}])

    return time.statement() //10:02:30.570Z

  • time.realtime(): localtime.realtime([{timezone}])

    return time.realtime() //10:02:30.647817Z
    return time.realtime('America/Los Angeles') //03:02:32.351-07:00

6.4.2.创建time

  • 创建localtime:
    time({hour [, minute, second, millisecond, microsecond, nanosecond, timezone]})

    unwind[time({hour: 12, minute: 31, second: 14, millisecond: 123, microsecond: 456, nanosecond: 789}),time({hour: 12, minute: 31, second: 14, nanosecond: 645876123}),time({hour: 12, minute: 31, second: 14, microsecond: 645876, timezone: '+01:00'}),time({hour: 12, minute: 31, timezone: '+01:00'}),time({hour: 12, timezone: '+01:00'})
] as theTime
return theTime
    返回值
    12:31:14.123456789Z
    12:31:14.645876123Z
    12:31:14.645876000+01:00
    12:31:00+01:00
    12:00:00+01:00

  • 创建 根据Time格式字符串: time(temporalValue)

    unwind[time('21:40:32.142+0100'),time('214032.142Z'),time('21:40:32+01:00'),time('214032-0100'),time('21:40-01:30'),time('2140-00:00'),time('2140-02'),time('22+18:00')] as theTime
return theTime
    返回值
    21:40:32.142000000+01:00
    21:40:32.142000000Z
    21:40:32+01:00
    21:40:32-01:00
    21:40:00-01:30
    21:40:00Z
    21:40:00-02:00
    22:00:00+18:00

  • 创建 使用其他时间组件： time({time [, hour, ..., timezone]})
    实例：

    with localtime({hour: 12, minute: 31, second: 14, microsecond: 645876}) AS tt
returntime({time: tt}) as timeOnly,time({time: tt, timezone: '+05:00'}) as timeTimezone,time({time: tt, second: 42}) as timeSS,time({time: tt, second: 42, timezone: '+05:00'}) as timeSSTimezone
    timeOnlytimeTimezonetimeSStimeSSTimezone
    12:31:14.645876Z12:31:14.645876+05:0012:31:42.645876Z12:31:42.645876+05:00

6.4.3.分割localime

time.truncate(unit [, temporalInstantValue [, mapOfComponents ] ])
实例：

with time({hour: 12, minute: 31, second: 14, nanosecond: 645876123, timezone: '-01:00'}) as t
return time.truncate('day', t) as truncDay,time.truncate('hour', t) as truncHour,time.truncate('minute', t) as truncMinute,time.truncate('second', t) as truncSecond,time.truncate('millisecond', t, {nanosecond: 2}) as truncMillisecond,time.truncate('microsecond', t) as truncMicrosecond
truncDaytruncHourtruncMinutetruncSecondtruncMillisecondtruncMicrosecond
00:00:00-01:0012:00:00-01:0012:31:00-01:0012:31:14-01:0012:31:14.645000002-01:0012:31:14.645876000-01:00

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