Question

description

Syntax

INT UNIX_TIMESTAMP(), UNIX_TIMESTAMP(DATETIME date), UNIX_TIMESTAMP(DATETIME date, STRING fmt),

将 Date 或者 Datetime 类型转化为 unix 时间戳。

如果没有参数，则是将当前的时间转化为时间戳。

参数需要是 Date 或者 Datetime 类型。

对于在 1970-01-01 00:00:00 之前或 2038-01-19 03:14:07 之后的时间，该函数将返回 0。

Format 的格式请参阅 date_format 函数的格式说明。

该函数受时区影响。

example

mysql> select unix_timestamp();
+------------------+
| unix_timestamp() |
+------------------+
|       1558589570 |
+------------------+

mysql> select unix_timestamp('2007-11-30 10:30:19');
+---------------------------------------+
| unix_timestamp('2007-11-30 10:30:19') |
+---------------------------------------+
|                            1196389819 |
+---------------------------------------+

mysql> select unix_timestamp('2007-11-30 10:30-19', '%Y-%m-%d %H:%i-%s');
+---------------------------------------+
| unix_timestamp('2007-11-30 10:30-19') |
+---------------------------------------+
|                            1196389819 |
+---------------------------------------+

mysql> select unix_timestamp('2007-11-30 10:30%3A19', '%Y-%m-%d %H:%i%%3A%s');
+---------------------------------------+
| unix_timestamp('2007-11-30 10:30%3A19') |
+---------------------------------------+
|                            1196389819 |
+---------------------------------------+

mysql> select unix_timestamp('1969-01-01 00:00:00');
+---------------------------------------+
| unix_timestamp('1969-01-01 00:00:00') |
+---------------------------------------+
|                                     0 |
+---------------------------------------+

keyword

UNIX_TIMESTAMP,UNIX,TIMESTAMP