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On passing an out-of-range value in UNIX_TIMESTAMP() or FROM_UNIXTIME() function, what MySQL will return?
When we pass an out-of-range value in UNIX_TIMESTAMP, MySQL returns 0. The valid range of value is same as for the TIMESTAMP data type.
Example
mysql> Select UNIX_TIMESTAMP('1969-01-01 04:05:45');
+---------------------------------------+
| UNIX_TIMESTAMP('1969-01-01 04:05:45') |
+---------------------------------------+
| 0 |
+---------------------------------------+
1 row in set (0.00 sec)When we pass an out-of-range value in FROM_UNIXTIME, MySQL returns NULL. The valid range of values is same as for the INTEGER data type.
Example
mysql> Select FROM_UNIXTIME(2147483648); +---------------------------+ | FROM_UNIXTIME(2147483648) | +---------------------------+ | NULL | +---------------------------+ 1 row in set (0.00 sec)
Updated on: 20-Jun-2020
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