Sqlite get records by hour

Use strftime():

Select name
from my_table
where strftime('%H', date_column) = '00';

This just checks the hour. You could use '%H:%M:%S' if you wanted more granularity.

EDIT:

You do not have a date time value. You have something else. It looks like a Unix epoch time measured in milliseconds rather than seconds. If so, the following should work:

Select name, datetime(date_column/1000, 'unixepoch')
from my_table
where strftime('%H', datetime(date_column/1000, 'unixepoch')) = '19';

However, none of the times are at hour 3. You may need to convert using your localtime.