将文本时间戳转换为日期

Question

I have a time stamp of the form 1518427677000 in a MySQL database. The type of the field in the database is TEXT. I would like to convert this value to DATETIME in MySQL Query.

I tried with CAST, CONVERT, STR_TO_DATE, date_format, FROM_UNIXTIME and UNIX_TIMESTAMP but all these functions return either an error or null.

Answer 1

1518427677000 looks like UNIX Epoch... in milliseconds. Just divide it by 1000:

SELECT FROM_UNIXTIME('1518427677000' / 1000)
-- 2018-02-12 14:27:57

Answer 2

It seems your timestamp is in milliseconds. User FROM_UNIXTIME after dividing by 1000:

SELECT FROM_UNIXTIME (1518427677)