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MySQL | UNIX_TIMESTAMP method

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schedule Mar 9, 2022
Last updated
local_offer MySQL
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MySQL's UNIX_TIMESTAMP(~) method returns a Unix timestamp representing seconds since '1970-01-01 00:00:00' UTC.

Parameters

1. date | date/datetime/timestamp | optional

The date/datetime/timestamp to return Unix timestamp for.

Return value

Case

Return value

No argument

Integer Unix timestamp

Argument has fractional seconds

Decimal Unix timestamp

Argument has no fractional seconds

Integer Unix timestamp

0

Outside range

'1970-01-01 00:00:01.000000'

-

'2038-01-19 03:14:07.999999'

UTC

Examples

No argument

To return the current Unix timestamp:

SELECT UNIX_TIMESTAMP();
+------------------+
| UNIX_TIMESTAMP() |
+------------------+
| 1587946242 |
+------------------+

Argument has fractional seconds

To return the current Unix timestamp for a datetime with fractional seconds:

SELECT UNIX_TIMESTAMP('2020-04-13 13:00:00.500000');
+----------------------------------------------+
| UNIX_TIMESTAMP('2020-04-13 13:00:00.500000') |
+----------------------------------------------+
| 1586750400.500000 |
+----------------------------------------------+

Note that the returned Unix timestamp is a decimal, containing information about microseconds (part after the .).

Argument has no fractional seconds

To return the current Unix timestamp for a datetime without fractional seconds:

SELECT UNIX_TIMESTAMP('2020-04-13 13:00:00');
+---------------------------------------+
| UNIX_TIMESTAMP('2020-04-13 13:00:00') |
+---------------------------------------+
| 1586750400 |
+---------------------------------------+

Outside range

If the argument is outside the range '1970-01-01 00:00:01.000000' to '2038-01-19 03:14:07.999999' UTC:

SELECT UNIX_TIMESTAMP('2040-04-13 13:00:00');
+---------------------------------------+
| UNIX_TIMESTAMP('2040-04-13 13:00:00') |
+---------------------------------------+
| 0 |
+---------------------------------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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