How to trim spaces from field in MongoDB query?

To trim spaces from field, use $trim in MongoDB. Let us create a collection with documents −

> db.demo217.insertOne({"FullName":"   Chris Brown"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e3e5d1e03d395bdc213470f")
}
> db.demo217.insertOne({"FullName":"   David Miller"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e3e5d2503d395bdc2134710")
}
> db.demo217.insertOne({"FullName":"   John Doe"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e3e5d2b03d395bdc2134711")
}

Display all documents from a collection with the help of find() method −

> db.demo217.find();

This will produce the following output −

{ "_id" : ObjectId("5e3e5d1e03d395bdc213470f"), "FullName" : "   Chris Brown" }
{ "_id" : ObjectId("5e3e5d2503d395bdc2134710"), "FullName" : "   David Miller" }
{ "_id" : ObjectId("5e3e5d2b03d395bdc2134711"), "FullName" : "   John Doe" }

Following is the query to trim spaces from field in MongoDB −

> db.demo217.aggregate([
...    { $project: { Name: { $trim: { input: "$FullName" } } } }
... ])

This will produce the following output −

{ "_id" : ObjectId("5e3e5d1e03d395bdc213470f"), "Name" : "Chris Brown" }
{ "_id" : ObjectId("5e3e5d2503d395bdc2134710"), "Name" : "David Miller" }
{ "_id" : ObjectId("5e3e5d2b03d395bdc2134711"), "Name" : "John Doe" }

AmitDiwan

Updated on 30-Mar-2020 12:40:10

• Related Questions & Answers
• How to query on list field in MongoDB?
• MongoDB query by sub-field?
• MongoDB query for a single field
• How to limit the amount of characters returned from a field in a MongoDB query?
• MongoDB query to update array with another field?
• Trim a string in Java to remove leading and trailing spaces
• Trim (Remove leading and trailing spaces) a string in C#
• MySQL query to get a field value that does not contain empty spaces?
• MongoDB query select and display only a specific field from the document?
• MongoDB query to change simple field into an object?
• Indexing large text field to make query faster in MongoDB
• How to add a field with static value to MongoDB find query?
• How to run MongoDB query to update only a specific field value?
• How to remove white spaces (leading and trailing) from string value in MongoDB?
• Field selection within MongoDB query using dot notation?