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MongoDB collection query to exclude some fields in find()?
Set the fields you don’t want to include as 0 as in the below syntax. Here, we have set fields “yourFieldName1” and “yourFieldName2” as 0 −
db.yourCollectionName.find(yourQuery, {yourFieldName1:0,yourFieldName2:0});To understand the above syntax, let us create a collection with documents −
> db.demo567.insertOne({"Name":"Chris",Age:21});{
"acknowledged" : true, "insertedId" : ObjectId("5e908fa139cfeaaf0b97b57b")
}
> db.demo567.insertOne({"Name":"David",Age:23});{
"acknowledged" : true, "insertedId" : ObjectId("5e908fa939cfeaaf0b97b57c")
}
> db.demo567.insertOne({"Name":"Bob",Age:22});{
"acknowledged" : true, "insertedId" : ObjectId("5e908faf39cfeaaf0b97b57d")
}
> db.demo567.insertOne({"Name":"Carol",Age:20});{
"acknowledged" : true, "insertedId" : ObjectId("5e908fb539cfeaaf0b97b57e")
}Display all documents from a collection with the help of find() method −
> db.demo567.find();
This will produce the following output −
{ "_id" : ObjectId("5e908fa139cfeaaf0b97b57b"), "Name" : "Chris", "Age" : 21 }
{ "_id" : ObjectId("5e908fa939cfeaaf0b97b57c"), "Name" : "David", "Age" : 23 }
{ "_id" : ObjectId("5e908faf39cfeaaf0b97b57d"), "Name" : "Bob", "Age" : 22 }
{ "_id" : ObjectId("5e908fb539cfeaaf0b97b57e"), "Name" : "Carol", "Age" : 20 }Following is the query to exclude some fields in find() −
> db.demo567.find({Name:{$in:["Chris","Bob"]}}, {Age:0,_id:0});This will produce the following output −
{ "Name" : "Chris" }
{ "Name" : "Bob" }
Updated on: 14-May-2020
7K+ Views
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