Text search in MongoDB with Regular Expression

For text search in MongoDB with Regular Expression, use $regex. Let us create a collection with documents −

> db.demo519.insertOne({"Value":"50,60,70"});{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e88b9c0b3fbf26334ef6111")
}
> db.demo519.insertOne({"Value":"80,90,50"});{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e88b9c7b3fbf26334ef6112")
}
> db.demo519.insertOne({"Value":"10,30,40"});{
   "acknowledged" : true,
   "insertedId" : ObjectId("5e88b9cfb3fbf26334ef6113")
}

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

> db.demo519.find();

This will produce the following output −

{ "_id" : ObjectId("5e88b9c0b3fbf26334ef6111"), "Value" : "50,60,70" }
{ "_id" : ObjectId("5e88b9c7b3fbf26334ef6112"), "Value" : "80,90,50" }
{ "_id" : ObjectId("5e88b9cfb3fbf26334ef6113"), "Value" : "10,30,40" }

Following is the query to implement text search in MongoDB with Regex −

> db.demo519.findOne({ Value: { $regex: /50/ } });

This will produce the following output −

{ "_id" : ObjectId("5e88b9c0b3fbf26334ef6111"), "Value" : "50,60,70" }