SECOND

Description

The SECOND function extracts the seconds portion from a specified datetime value, returning an integer result from 0 to 59. This function supports processing DATE, DATETIME, and TIME types.

This function behaves consistently with MySQL's second function.

Syntax

SECOND(<date_or_time_expr>)

Parameters

Parameter	Description
<date_or_time_expr>	The input datetime value. Can be of type DATE, DATETIME, or TIME. For specific datetime/date/time formats, see datetime conversion and date conversion, time conversion.

Return Value

Returns a value of type INT, representing the seconds portion of the input datetime:

• Range: 0 to 59 (inclusive)
• If the input is DATE type, returns 0 (because default time is 00:00:00)
• If the input is NULL, returns NULL
• Ignores microseconds portion (e.g., 12:34:56.789 only extracts 56 seconds)

Examples

--- Extract seconds from DATETIME
SELECT SECOND('2018-12-31 23:59:59') AS result;
+--------+
| result |
+--------+
|     59 |
+--------+

--- Input is TIME type
SELECT SECOND(cast('15:42:33' as time)) AS result;
+--------+
| result |
+--------+
|     33 |
+--------+

--- Input is DATE type (default seconds is 0)
SELECT SECOND('2023-07-13') AS result;
+--------+
| result |
+--------+
|      0 |
+--------+

--- Time with microseconds (ignores microseconds)
SELECT SECOND('2023-07-13 10:30:25.123456') AS result;
+--------+
| result |
+--------+
|     25 |
+--------+

--- Case where seconds is 0
SELECT SECOND('2024-01-01 00:00:00') AS result;
+--------+
| result |
+--------+
|      0 |
+--------+

--- Input is NULL (returns NULL)
SELECT SECOND(NULL) AS result;
+--------+
| result |
+--------+
| NULL   |
+--------+