presto unixtimestamp轉標准日期

用到presto兩個函數

1. from_unixtime

2.format_datetime

select
'1566748800000',
substr('1566748800000',1,10) as a,
from_unixtime(cast(substr('1566748800000',1,10) as int)) as b, -- 將13位毫秒級的unix timestamp截取到秒級別
format_datetime(from_unixtime(cast(substr('1566748800000',1,10) as int)),'yyyy-MM-dd')

 

轉換結果

參考資料 https://prestodb.github.io/docs/current/functions/datetime.html