How to store timestamp value upto only 3 millisecond digit in Postgre SQL

How to store timestamp value upto only 3 millisecond digit in Postgre SQL

I have to store upto 3 millisecond digit in timestamp column.

I have to store upto 3 millisecond digit in timestamp column.

I have two fixed column in each tables: createdDate,LastmodifiedDate.

While inserting data value of CreatedDate/LastmodifiedDate:

now() at time zone 'utc'

But it is storing 5 digit of millisecond. 

I would like to store only 3 fractional digit of millisecond.

let me suggest which type of datatype is storing only 3 fractional digit of millisecond.

let me know if you have any solution.

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