Telling Story using Data
Into :
Terminator. Public said we will create them someday. Today is 2018, The hypest topic in technology is Machine Learning, Data Science, and Internet of Think. Our every activites is recorded and become data but how is our knowledge is result from brainwash? Have you ever heard the job about Driving Public Opini.



I wanna share knowlegde which I got from seminar yesterday. The Topic is "Telling Story using Data". I can say if we make analogical how data works like how to cook.

We have a customer, he has bunch of data but he don't know what to do with it. Imagine the data is egg from poultry farm.

Data Flow

What do you want to Eat? (Introduction)

What we want to make. 
Let's define what is our goal.

Where we can get the Ingredient? (Data Gathering)

Let find which egg we should use, duck or chicken. 
then you will know what kind of data you'll need to gather. What technique method to understand it and what informations you'd like to get, best way to visualize

What can we do with the Ingredient? (Data Visualisation & Analytics)

We can create omelet and fried egg.

Enjoy it! (Business Implementation)

Let me try it taste.
Let see the story result


An e-commerce must care about their conversion rate, customer rate, customer lifetime value, retention rate

usually we should have north star metric, what is that? The North Star Metric is the single metric that best captures the core value that your product delivers to customers

Metrics

Here are list of metric that can be matter.

Acquisition

Function : Generate attention through a variety of means
Relevant metric : Traffic, mentions, cost per click, search results, cost of acquisition, open rate

Activation

Function : Turn the resulting drive-by visitors into users who are somehow enrolled
Relevant metric : Enrollments, signups, completed, onboarding process, used the service at least once, subscriptions

Retention

Function : Convince users to come back repeatedly
Relevant metric : Engagement, time since last visit, daily and monthly active use, churns

Revenue

Function : Business outcomes (purchases, ad clicks, content creation, subscriptions, etc)
Relevant metric : Customer lifetime value, conversion rate, shopping cart, size, click-through-revenue


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Learn Java Stream from SQL Query : Distinct
Sometimes there is some duplicate data that we think not important. Like Students in Scholl have address data but we only need from where they comes. So we want to distinct that data. I have 2 distinct type. First is get only unique data from subdata like address, or we want to keep distinct returning full Model data like representation only.

Code :
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result :

Ricoaw
Arisandy
Wijaya
Soekarno
Diponegoro
Patimura
Fatmawati
Hatta

You should put distinct after map to only get single subdata(field).


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How to enable java 8 in Maven Project
If you don't create java 8 as your default JAVA_HOME directories, you need to download java 8 and config that again. In maven, here the code to activate java 8 for your Maven Module.

Code :

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The key is at here

Code :

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