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Anil  Bist / Professional / DataBase

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How do you get the number of Debit and Credit transactions? One way to do it is by using count() function as below.

> db. transactions.count ( { cr_dr : "D" } );



> db.transactions.find ( { cr_dr : "D" } ).length ( );  


But what if you do not know the possible values of cr_dr upfront. Here Aggregation framework comes to play. See the below Aggregate query


And the result is


Anil  Bist

Skills    Mongodb

Qualifications :- High School - SLV, College/University - Graphic Era Deemed Univ University,
Location :-Dehradun,Dehradun,Uttarakhand,India

I started my Professional Journey in 2006 with one of the Web Development Company in Bangalore and my 1st framework was "Ruby on Rail" as Web development and delivered around 5+ Projects using this platform. Then came another dimension as JEE/Sturst framework, Gradually I realized that I want to build something on my own and give my passion and energy on creating something different a


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