how to get produce timestamp like rails

ruby_rails_timestamp.rb

# how to get produce timestamp like rails
#
# ActiveRecord::Schema[7.0].define(version: 2023_03_19_164906) do
#   create_table "articles", force: :cascade do |t|
#     t.datetime "created_at", null: false
#     t.datetime "updated_at", null: false
#   end
# end

# `%6N` is microsecond ( 6 digits )
p Time.now.strftime("%Y-%m-%d %H:%M:%S.%6N")
# "2023-03-28 00:04:10.054370"