Mongodb if else statement

Mongodb if else statement

According to MongoDb docs, $cond "evaluates a Boolean expression to return one of the two specified return expressions".
Syntax:

{$cond: { if: <expression>,
                     then: <true>,
                    else: <false>
       }
}

OR

{$cond: [<expression>, <true>, <false>] }


Example for MongoDb if else statement

db.customers.aggregate(
   [{
         $project:
           {
             C_Id: 1,
             C_Type:
               {
                 $cond: {
                                    if: { $gte: [ "$C_Id", "IT "] },
                                                then: "N_Customer",
                                                else: "VIP_Customer"
                                       }
               }
           }
    }]
)

For more detail, go to

ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..

My Tech Blog - https://www.code-sample.com/
My Books - Book 1 and Book 2

www.code-sample.com/. Powered by Blogger.
^