Date Functions
CURRENT_DATE
CURRENT_DATE([time_zone])
Description
Return the current date.
Input
timezone(optional,STRING): The default timezone is UTC. You can optionally specify a time zone.
Return Data Type
DATE
Example
Result: 2021-04-26
Result: 2021-04-25
DATE
Date(date_expression_column)
Description
Convert a string, timestamp, or datetime expression to a date variable in a "yyyy-mm-dd" format. For the timestamp inputs, you can optionally specify a time zone.
Input
A STRING, DATETIME, TIMESTAMP object or column
Return Data Type
DATE
Example
Result: 2016-12-25
Result: 2016-12-25
Result: 2016-12-24
EXTRACT
EXTRACT(date_part FROM date)
Description
Return a part of the date expression as an integer.
Input
date_part: DAY, WEEK(begins on Sunday), ISOWEEK(begin on Monday), MONTH, QUARTER, YEAR, or ISOYEAR (See more details)date: aDATEobject or column
Return Data Type
DATE
Example
Result: 25
DATE_ADD
DATE_ADD(date, INTERVAL integer date_part)
Description
Add a specified time interval to the given date.
Input
date_part: DAY, WEEK, MONTH, QUARTER, or YEAR (See more details)integer: the number ofdate_partdate: aDATEobject or column
Return Data Type
DATE
Example
Result: 2020-12-30
DATE_SUB
DATE_SUB(date, INTERVAL integer date_part)
Description
Add a specified time interval to the given date.
Input
date_part: DAY, WEEK, MONTH, QUARTER, or YEAR (See more details)integer: the number ofdate_partdate: aDATEobject or column
Return Data Type
DATE
Example
Result: 2020-12-20
DATE_DIFF
DATE_DIFF(date1, date2, date_part)
Description
Return the difference between two dates (date1-date2). The difference is expressed in units of date_part. The date_part can be .
Input
date1: aDATEobject or columndate2: aDATEobject or columndate_part: can be one of the following: DAY, WEEK(begins on Sunday), ISOWEEK(begins on Monday), MONTH, QUARTER, YEAR, or ISOYEAR (See more details)
Return Data Type
INTEGER
Example
Result: 2
DATE_TRUNC
DATE_TRUNC(date, date_part)
Description
Truncate a specific date to the start of a given unit of duration and returns a new date. The unit of duration is defined by date_part.
Input
date: aDATEobject or columndate_part: can be one of the following: DAY, WEEK, WEEK(<weekday>), ISOWEEK, MONTH, QUARTER, YEAR, or ISOYEAR (See more details)
Return Data Type
DATE
Example
Result: 2021-04-01
Result: 2021-04-19
DATE_FROM_UNIX_DATE
DATE_FROM_UNIX_DATE(integer)
Description
Transform a UNIX date expression (that is, the number of days since 1970-01-01) into a standard date format (yyyy-mm-dd).
Input
an INTEGER object or column
Return Data Type
DATE
Example
Result: 2021-01-23
FORMAT_DATE
FORMAT_DATE(format, date)
Description
Transform a date variable into a string variable in a specific format.
Input
format: aSTRINGexpression. To see supported format elements, visit here.date: aDATEobject or column
Return Data Type
STRING
Example
Result: Dec-25-2008
PARSE_DATE
PARSE_DATE(format, date_expression)
Description
Convert a string to a date column according to the specified format.
Input
format: aSTRINGexpression. To see supported format elements, visit here.date_expression: aSTRINGobject or column
Return Data Type
DATE
Example
Result: 2021-02-11
LAST_DAY
LAST_DAY(date, [date_part])
Description
Extract the last day of a given unit of duration for a given date. The unit of duration is defined by date_part. This is commonly used to return the last date of the month.
Input
date_part: (optional) can be one of the following: YEAR, QUARTER, MONTH, WEEK, WEEK(), ISOWEEK, or ISOYEAR (See more details)date: aDATEobject or column
Return Data Type
DATE
Example
Result: 2021-03-31
Result; 2021-03-27
UNIX_DATE
UNIX_DATE(date)
Description
Return the number of days since 1970-01-01.
Input
a DATE object or a DATE column
Return Data Type
INTEGER
Example
Result: 18621
Details about date_part
Part | Description |
DAYOFWEEK | The weekday from 1 to 7 with Sunday as the first day of the week. |
DAY | The day of the month. |
DAYOFYEAR | The day of the year. |
WEEK | The week number of the date from 0 to 53. (Weeks begin with Sunday, and dates prior to the first Sunday of the year are in week 0) |
WEEK(<WEEKDAY>): | The week number of the date from 0 to 53. (You can optionally specify the first weekday of a week and weeks begin with the weekday that you specified. Dates prior to the first <WEEKDAY> of the year are in week 0. Valid values for <WEEKDAY> are SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, and SATURDAY.) |
ISOWEEK | Returns the ISO 8601 week number of the date from 1 to 53 with Monday as the first day of the week. (The first ISOWEEK of each ISO year begins on the Monday before the first Thursday of the Gregorian calendar year.) |
MONTH | Return the month of the date. |
QUARTER | Return values in the range between 1 and 4. |
YEAR | Return the month of the year. |
ISOYEAR | Return the ISO 8601 week-numbering year, which is the Gregorian calendar year containing the Thursday of the week to which date_expression belongs. |
Supported Format Elements
Format element | Description | Example |
%A | Return the full weekday name. | Tuesday |
%a | Return the abbreviated weekday name. | Tue |
%B | Return the full name of the month. | May |
%b or %h | Return the abbreviated name of the month. | May |
%C | Return the century | 20 |
%c | Return the date and time in a format of "%a %b %e %T %Y" | Tue May 4 15:31:13 2021 |
%D | Return the date in a format of "%m/%d/%y". | 05/04/21 |
%d | Return the day of the month. | 04 |
%e | Return the day of month without leading 0. | 4 |
%F | Return the date in a format of "%Y-%m-%d" | 2021-05-04 |
%G | Return the ISO 8601 year with the century. The ISO 8601 year begins on the Monday before the first Thursday of the Gregorian calendar year. | 2021 |
%g | Return the ISO 8601 year without the century. The ISO 8601 year begins on the Monday before the first Thursday of the Gregorian calendar year. | 21 |
%H | Return the hour in the 24-hour clock (00-23). | 15 |
%I | Return the hour in the 12-hour clock (01-12). | 03 |
%j | Return the day of the year (001-366). | 124 |
%k | Return the hour (0-23) in the 24-hour clock without leading 0. | 15 |
%l | Return the hour (1-12) in the 12-hour clock without leading 0 | 3 |
%M | Return the minute of the time (00-59). | 31 |
%m | Return the month of the date (01-12). | 05 |
%n | Return a newline character. | |
%P | Return a lowercase "am" or "pm". | pm |
%p | Return an uppercase "AM" or "PM". | PM |
%Q | Return the quarter of the date (1-4). | 2 |
%R | Return the time in a format of "%H:%M". | 15:31 |
%r | Return the time in the 12-hour clock with AM/PM notation. | 03:31:13 PM |
%S | Return the second of the time (00-60). | 13 |
%s | Return the number of seconds since 1970-01-01 00:00:00 UTC. | 1620142273 |
%T | Return the time in a format of %H:%M:%S. | 15:31:13 |
%t | Return a tab character. | |
%U | Return the week number (00-53) of the year. Sunday is the first day of the week | 18 |
%u | Return the weekday of the date as 1-7. Monday is the first day of the week. | 2 |
%V | Return the ISO 8601 week number (01-53) of the year. Monday is the first day of the week. If the week containing January 1 has four or more days in the new year, then it returns "week 1". Otherwise, it returns "week 53" of the previous year, and considers the next week as "week 1". | 18 |
%W | Return the week number(00-53) of the year. Monday is the first day of the week. | 18 |
%w | Return the weekday of the date as 0-6. Sunday is the first day of the week. | 2 |
%X | Return the time in a format of "HH:MM:SS" | 15:31:13 |
%x | Return the date in a format of "MM/DD/YY" | 05/04/21 |
%Y | Return the year with the century | 2021 |
%y | Return the year (00-99) without the century with an optional leading zero. Can be mixed with %C. If %C is not specified, years 00-68 are the 2000s, while years 69-99 are the1900s. | 21 |
%Z | Return the time zone name. | UTC-5 |
%z | Return the offset from the Prime Meridian in the format +HHMM or -HHMM as appropriate, with positive values representing locations east of Greenwich. | \-0500 |
%% | Return a single "%" character. | % |
%Ez | Return the RFC 3339-compatible numeric time zone (+HH:MM or -HH:MM). | \-05:00 |
%E#S | Return the seconds with the given number of digits of fractional precision. The "#" should be replaced by a number. | "%E3S" returns 37.021 |
%E*S | Return the seconds with full fractional precision. | 37.021851 |
%E4Y | Return the year in 4 digits (0000-9999). | 2021 |
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