MongoDB $exists operator with 'false' keyword If we want to fetch documents from the collection "testtable" where the field "community_members" does not exists, the following mongodb command can be used : >db.t
The following mongodb find() operation queries all documents from the collection where the value of the batch field is 10452. The $elemMatch projection returns only the first matching element (although it matches more than one elements) of the tran_details array where the prate field has a v...
MongoDB Update OperatorsThere are many update operators that can be used during document updates.FieldsThe following operators can be used to update fields:$currentDate: Sets the field value to the current date $inc: Increments the field value $rename: Renames the field $set: Sets the value ...
Thepricemust be more than or equal to 7 the following mongodb command can be used : >db.table1.find( { "description": { $elemMatch: { "agegroup" : "10-13","price":{$gte:7}}}).pretty(); N.B.find() method displays the documents in a non structured format but to display the...