timestampdiff ?? ???

timestampdiff ??? ? ?? ?? ??? ?? ??? ????, ? ?? ?? ??? ?? ??? ????, ??? ? ??? ???? ? ?????. timestampdiff ??? ?? ?? ??? ?? ?? ? ?? ??? ??? ?????. PHP ??? ????? ??? ?? ?? ? ?? ?? ?????.

287

????? ?? ?? mysql ????? timestampdiff oracle timestamp ???? ?

???? ??：Dec 01, 2023 am 09:53 AM

timestampdiff ?? ???

timestampdiff ??? ? ?? ?? ??? ?? ??? ????, ? ?? ?? ??? ?? ??? ????, ??? ? ??? ???? ? ?????. ??? ?? ??? ??? ?? ?? ? ?? ??/?? ?? ????? ?? ???. ? ??? SQL ???? ?? ? ?? ??? ???? ?? ????? ?? ?????.

Dec 01, 2023 am 09:50 AM

????? ?? ??

MySQL? TIMESTAMPDIFF ??? ???? ? ????? ?? ??? ?????. ? ???????? ?????? ??????? ??? ? ??? ?? ?? ?? ???? ???? ???? ?? MySQL? ?????. ? ????? ?? ??? ???? ?? ?? ???? ?? ?????. MySQL? ? ????? ?? ??? ?? ???? ?? TIMESTAMPDIFF ??? ?????. TIMESTAMPDIFF ??? ??? ??? ????. TIMESTAMPDIFF

Jul 25, 2023 pm 01:43 PM

mysql ????? timestampdiff

UNIX_TIMESTAMP() ??? ?? ??? ??????

UNIX_TIMESTAMP ??? ? ??? ??? ?????. ?, ??? ??? ?? ?? ??/?? ?? ? ?? ?????. ?? ?? '1970-05-1505:04:30' ??? UNIX_TIMESTAMP ??? ?? ? 11576070?? ?????. mysql>selectUNIX_TIMESTAMP('1970-05-1505:04:30');+-------------------------------- -------+|UNIX_TIMESTAMP('1970-05-

Sep 02, 2023 pm 01:05 PM

????? ?????? ???? ??

??: 1. "to_timestamp()" ??? ???? ???? ?????? ?????. 2. "to_date()" ??? ???? ?????? ?? ???? ?????. 3. CAST ??? ???? ????? ??? ??? ?????. .

Jan 26, 2022 pm 03:50 PM

oracle

UNIX_TIMESTAMP() ?? FROM_UNIXTIME() ??? ??? ??? ?? ??? ? MySQL? ??? ??????

UNIX_TIMESTAMP?? ??? ??? ?? ???? MySQL? 0? ?????. ??? ? ??? TIMESTAMP ??? ??? ?????. ? mysql>SelectUNIX_TIMESTAMP('1969-01-0104:05:45');+------------------ --- --------+|UNIX_TIMESTAMP('1969-01-0104:05:45')|+--------- --

Aug 31, 2023 pm 08:01 PM

MySQL? ????? 2038 ??? ???? ??

?????? ???? ??? 1970? 1? 1? 00:00:00(??? ?? 1970? 1? 1? 08:00:00)?? ????? ? ? ?? ?????. MySQL 5.5/5.6/5.7? ? ?? ?? ??? N ??? ??? ???? ??? ??? MySQL? MySQL? ?? ?? ????? ?? ??? SQL? ?? ???? ??? ?????. ??? ?? ???? ??? ?????. ????? ??? ??? ?? ? ?? ?? MySQL ???? ?? ?????(Timestamp) ??? ? ??? '1970-01-0100:00:01&r

Jun 02, 2023 am 10:13 AM

mysql timestamp

MySQL DATETIME? TIMESTAMP ??? ??? ???? ??????

? ??? ?? ?? "YYYY-MM-DDHH:MM:SS" ???? ???? ???? ??? ??? ?????. ??? ????? ???? ??? ?? ???? ????. - ?? - ??/?? ??? ??? 1000-01-0100:00:00? 9999-12-3123:59:59 ??? ??? ??? ?????. ??? ????? ??? ??? "1970-01-0100:00:01"? "2038-01-1908:44:07" ??? ??? ??? ?????. ?? - ??/???? ?? ? ??? ??? ?? 5???? 3???? ?? ???? ?????. ??, ????? ??? ???? ?? ? ???? ?? 4???? 3???? ?? ???? ?????.

Sep 17, 2023 pm 11:41 PM

SQL ?? ????? ?? ?? ??

?? ?? ?? SQL?? ?????? ??? ???? ??? ?? ??? ?????. ??? ???? ???? ??? ? ? ????.

Jan 17, 2018 am 10:11 AM

timestamp ???? ?

MySQL TIMESTAMP? ???? ??? ??? ???? ??? ?? ??? ???? ??? ??????

??? ?? ?? ??? ???? ?? ?? "T"(????)? ??? ? ????. ?? ?? ??? ???? ??? ? ????. -mysql>SelectTIMESTAMP('2017-10-20T06:10:36');+---------------------- ----- ----------+|TIMESTAMP('2017-10-20T06:10:36')|+---- ------ ----------+|2017-10-2006:1

Sep 01, 2023 pm 10:29 PM