datetime YYYY-MM-DD HH:MM:SS
date YYYY-MM-DD
unixstamp 时间戳 10位数字
select UNIX_TIMESTAMP();
select UNIX_TIMESTAMP(NOW());
select now();
select date("2019-12-24 14:24:30");
datetime YYYY-MM-DD HH:MM:SS
date YYYY-MM-DD
unixstamp 时间戳 10位数字
select UNIX_TIMESTAMP();
select UNIX_TIMESTAMP(NOW());
select now();
select date("2019-12-24 14:24:30");