I've tried multiple solutions, but I keep getting errors. I need to create a new column casting VARCHAR to TIMESTAMP that includes AM, PM or -ideally- changes it to 24 hrs format.
VARCHAR format (Start_Date column): 8/3/2022 4:58:49 PM
I found the below solution is some other post, but I'm getting error: 'Format code appears twice'
SELECT itab.*,
TO_TIMESTAMP(Start_Date, 'MM/DD/YYYY HH:MM:SS AM') AS start_TS
FROM db.info_table itab
Please advise.
CodePudding user response:
You have two problems.
- MI is the format for minutes, MM is for months (you have it twice, this is why you are getting that error).
- Your date/time string has single digit values for month, day, etc. You can use a pretty simple regex for that.
select to_timestamp(regexp_replace('8/3/2022 4:58:49 PM', '\b([0-9])\b', '0\1'), 'MM/DD/YYYY HH:mi:SS AM')
CodePudding user response:
TO_TIMESTAMP returns a TIMESTAMP(6). If you don't want microseconds you can specify the precision using
CAST(RegExp_Replace(start_date, '\b([0-9])\b', '0\1') AS timestamp(0) FORMAT 'MM/DD/YYYYbHH:Mi:SSbT')