Date, time, and timestamp literals - AWS Clean Rooms
DatesTimesTimestampsSpecial datetime values

Date, time, and timestamp literals

Following are rules for working with date, time, and timestamp literals that are supported by AWS Clean Rooms.

Dates

The following table shows input dates that are valid examples of literal date values that you can load into AWS Clean Rooms tables. The default MDY DateStyle mode is assumed to be in effect. This mode means that the month value precedes the day value in strings such as 1999-01-08 and 01/02/00.

Note

A date or timestamp literal must be enclosed in quotation marks when you load it into a table.

Input date Full date
January 8, 1999 January 8, 1999
1999-01-08 January 8, 1999
1/8/1999 January 8, 1999
01/02/00 January 2, 2000
2000-Jan-31 January 31, 2000
Jan-31-2000 January 31, 2000
31-Jan-2000 January 31, 2000
20080215 February 15, 2008
080215 February 15, 2008
2008.366 December 31, 2008 (the three-digit part of date must be between 001 and 366)

Times

The following table shows input times that are valid examples of literal time values that you can load into AWS Clean Rooms tables.

Input times Description (of time part)
04:05:06.789 4:05 AM and 6.789 seconds
04:05:06 4:05 AM and 6 seconds
04:05 4:05 AM exactly
040506 4:05 AM and 6 seconds
04:05 AM 4:05 AM exactly; AM is optional
04:05 PM 4:05 PM exactly; the hour value must be less than 12
16:05 4:05 PM exactly

Timestamps

The following table shows input timestamps that are valid examples of literal time values that you can load into AWS Clean Rooms tables. All of the valid date literals can be combined with the following time literals.

Input timestamps (concatenated dates and times) Description (of time part)
20080215 04:05:06.789 4:05 AM and 6.789 seconds
20080215 04:05:06 4:05 AM and 6 seconds
20080215 04:05 4:05 AM exactly
20080215 040506 4:05 AM and 6 seconds
20080215 04:05 AM 4:05 AM exactly; AM is optional
20080215 04:05 PM 4:05 PM exactly; the hour value must be less than 12
20080215 16:05 4:05 PM exactly
20080215 Midnight (by default)

Special datetime values

The following table shows special values that can be used as datetime literals and as arguments to date functions. They require single quotation marks and are converted to regular timestamp values during query processing.

Special value Description
now Evaluates to the start time of the current transaction and returns a timestamp with microsecond precision.
today Evaluates to the appropriate date and returns a timestamp with zeroes for the time parts.
tomorrow

Evaluates to the appropriate date and returns a timestamp with zeroes for the time parts.
yesterday

Evaluates to the appropriate date and returns a timestamp with zeroes for the time parts.

The following examples show how now and today work with the DATEADD function.

select dateadd(day,1,'today');

date_add
---------------------
2009-11-17 00:00:00
(1 row)

select dateadd(day,1,'now');

date_add
----------------------------
2009-11-17 10:45:32.021394
(1 row)