How to use chartjs

Basically I want to use 'chartjs' for display "Clustered Bar chart", with following things year wise

Total amount

Amount Received

Amount Left

I want to fetch data from data base and display it on chart, I have saved data of all above field  3 fields in one table for each date and I want to also fetch year from Datefield. 

So, basically can anyone give me any resource or something for such type of  requirement. Main things is how to display Clustered bar chart by fetching data from database for each year. 

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