Update Date column in oracle 12c

I want to update a column in oracle table. column type is timestamp. I have to run the below query:

Update address set created_date = '6/16/2015 7:57:20.834000 AM' Where id = 123;

date  '6/16/2015 7:57:20.834000 AM'  is a hard coded value. I am trying with to_timestamp as am/pm but unable to do so
Vishal JaiswalDatabase ArchitectAsked:
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slightwv (䄆 Netminder) Commented:
to_timestamp('6/16/2015 7:57:20.834000 AM','MM/DD/YYYY HH:MI:SS.FF6 AM')

The docs have all the date format items:

For AM/PM look at:  Meridian indicator with or without periods.

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Vishal JaiswalDatabase ArchitectAuthor Commented:
Thanks for your help. It help me in getting AM/PM conversion.
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