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Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

TRUNC function

Truncates a TIMESTAMP and returns a DATE.

This function can also truncate a number. For more information, see TRUNC function.

Syntax

TRUNC(timestamp)

Arguments

Return type

DATE

Examples

The following example returns the date portion from the result of the SYSDATE function (which returns a timestamp).

SELECT SYSDATE;

+----------------------------+
|         timestamp          |
+----------------------------+
| 2011-07-21 10:32:38.248109 |
+----------------------------+

SELECT TRUNC(SYSDATE);

+------------+
|   trunc    |
+------------+
| 2011-07-21 |
+------------+

The following example applies the TRUNC function to a TIMESTAMP column. The return type is a date.

SELECT TRUNC(starttime) FROM event
ORDER BY eventid LIMIT 1;

+------------+
|   trunc    |
+------------+
| 2008-01-25 |
+------------+

The following example returns a timestamp value with 00:00:00 as the time by casting the TRUNC function result to a TIMESTAMP.

SELECT CAST((TRUNC(SYSDATE)) AS TIMESTAMP);

+---------------------+
|        trunc        |
+---------------------+
| 2011-07-21 00:00:00 |
+---------------------+