查阅官档:
FROM_UNIXTIME(
, unix_timestamp
)FROM_UNIXTIME(
unix_timestamp
,format
)
Returns a representation of the unix_timestamp
argument as a value in ‘YYYY-MM-DD HH:MM:SS‘
orYYYYMMDDHHMMSS
format, depending on whether the function is used in a string or numeric context. The value is expressed in the current time zone. unix_timestamp
is an internal timestamp value such as is produced by theUNIX_TIMESTAMP()
function.
说明from_unixtime只是按照当前的时区,已指定的形式返回unix_timestamp值。
UNIX_TIMESTAMP()
, UNIX_TIMESTAMP(
date
)
If called with no argument, returns a Unix timestamp (seconds since ‘1970-01-01 00:00:00‘
UTC) as an unsigned integer. If UNIX_TIMESTAMP()
is called with a date
argument, it returns the value of the argument as seconds since ‘1970-01-01 00:00:00‘
UTC. date
may be a DATE
string, a DATETIME
string, a TIMESTAMP
, or a number in the format YYMMDD
or YYYYMMDD
. The server interprets date
as a value in the current time zone and converts it to an internal value in UTC
不同点在与,unix_timestamp会受到本地时区的影响,有可能2个不同的timstamp对应一个unixtimestamp,而from_unixtime则是一一对应
MySQL中from_unixtime与unix_timestamp差别