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LAST UPDATED: 27 Oct, 2022 110 PEOPLE USED
Answer By: Roxy Rumble
Require your help as stuck in time conversion in presto. I have a epoch column with name timestamp as a string datatype and i want to convert this into date timestamp. I have used the below query after reading through various blogs: SELE
Example of Unix Epoch Time: Presto provides many date time functions to help with conversion. In case of a Unix Epoch Time, the from_unixtime function can be used to convert the Epoch time. This function returns a timestamp.
➠ Convert Epoch Time to TIMESTAMP (6): Below conditions should met to apply logic as explained in examples. Epoch time should be in seconds with milliseconds appended at the end. This means that length of epoch time should be 13 digits and last 3 digits of epoch time will represent milliseconds.
To test this out we can use Presto’s built-in current_timestamp function (an alias for the now () function) that returns the current system time as a timestamp: presto> select current_timestamp as "Date & Time Here Now"; Date & Time Here Now --------------------------------------- 2020-11-27 13:20:04.093 Europe/London (1 row)
unix_timestamp( string date, string pattern ) : This function converts the date to the specified date format and returns the number of seconds between the specified date and Unix epoch.
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