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How do I list all documents in a collection but show a single property through a console window?

//Trying to just show name property
db.mycollection.find(name);

The find mongo command accepts 2 parameters:

db.collection.find(query, projection)

query (Optional):

Specifies selection filter using query operators. To return all
documents in a collection, omit this parameter or pass an empty
document ().

projection (Optional):

Specifies the fields to return in the documents that match the query
filter. To return all fields in the matching documents, omit this
parameter. For details, see Projection.

In your scenario you have to use the projection parameter to specify which fields to be returned as so:

db.mycollection.find(, _id: 0, name: 1);

Since you do not care about providing criteria you can just leave that as empty object.

The _id: 0, name: 1 means that you do not want the default _id field included in the results and only care/want the name field.

You can set your showing propertys this way:

db.mycollection.find(name:name, _id:0, name:1);

It will only show the name and hide the _id

db.mycollection.find(, _id:0, name: 1)