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Anil  Bist / Professional / DataBase

 
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Lessons:-Count

Count

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" } );

 

or

> 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

 

 
 
 
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Anil  Bist

Skills    Mongodb

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

in 2006, i Join a web development company in Bangalore and start work on "Ruby on Rail" this is my first web development framework and we worked in this framework and develop four to five project after some time , I moved to JEE/Sturst frame work,

After some time i decided that now times come and I have to go on in my own way and I started a company name is "Soarlogic&q
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