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Search by specific field in MongoDB
Let us first create a collection with documents −
> db.demo371.insertOne({"Name":"David","CountryName":"US"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e57f6982ae06a1609a00af2")
}
> db.demo371.insertOne({"Name":"John","CountryName":"UK"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e57f69e2ae06a1609a00af3")
}
> db.demo371.insertOne({"Name":"Bob","CountryName":"AUS"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e57f6a42ae06a1609a00af4")
}
> db.demo371.insertOne({"Name":"Mike","CountryName":"US"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e57f6ba2ae06a1609a00af5")
}Display all documents from a collection with the help of find() method −
> db.demo371.find();
This will produce the following output −
{ "_id" : ObjectId("5e57f6982ae06a1609a00af2"), "Name" : "David", "CountryName" : "US" }
{ "_id" : ObjectId("5e57f69e2ae06a1609a00af3"), "Name" : "John", "CountryName" : "UK" }
{ "_id" : ObjectId("5e57f6a42ae06a1609a00af4"), "Name" : "Bob", "CountryName" : "AUS" }
{ "_id" : ObjectId("5e57f6ba2ae06a1609a00af5"), "Name" : "Mike", "CountryName" : "US" }Following is the query to search by specific fields −
> db.demo371.find({ $or: [ { Name: "David" }, { CountryName: "UK"} ] } )This will produce the following output −
{ "_id" : ObjectId("5e57f6982ae06a1609a00af2"), "Name" : "David", "CountryName" : "US" }
{ "_id" : ObjectId("5e57f69e2ae06a1609a00af3"), "Name" : "John", "CountryName" : "UK" }
Updated on: 02-Apr-2020
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