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MongoDB find by multiple array items?
You can use $all operator to find by multiple array items. To understand the concept, let us create a collection with the document.
The query to create a collection with a document is as follows −
> db.findByMultipleArrayDemo.insertOne({"StudentFirstName":"John","StudentLastName":"Smith",
"StudentCoreSubject":["Compiler","Operating System","Computer Networks"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c7ef07b559dd2396bcfbfc4")
}
> db.findByMultipleArrayDemo.insertOne({"StudentFirstName":"Carol","StudentLastName":"Taylor",
"StudentCoreSubject":["MongoDB","MySQL","SQL Server"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c7ef09d559dd2396bcfbfc5")
}
> db.findByMultipleArrayDemo.insertOne({"StudentFirstName":"Bob","StudentLastName":"Taylor",
"StudentCoreSubject":["MongoDB","MySQL","SQL Server"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c7ef0c7559dd2396bcfbfc6")
}
> db.findByMultipleArrayDemo.insertOne({"StudentFirstName":"David","StudentLastName":"Johnson",
"StudentCoreSubject":["Compiler","Operating System","Computer Networks"]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c7ef0f2559dd2396bcfbfc7")
}Display all documents from a collection with the help of find() method. The query is as follows −
> db.findByMultipleArrayDemo.find().pretty();
The following is the output −
{
"_id" : ObjectId("5c7ef07b559dd2396bcfbfc4"),
"StudentFirstName" : "John",
"StudentLastName" : "Smith",
"StudentCoreSubject" : [
"Compiler",
"Operating System",
"Computer Networks"
]
}
{
"_id" : ObjectId("5c7ef09d559dd2396bcfbfc5"),
"StudentFirstName" : "Carol",
"StudentLastName" : "Taylor",
"StudentCoreSubject" : [
"MongoDB",
"MySQL",
"SQL Server"
]
}
{
"_id" : ObjectId("5c7ef0c7559dd2396bcfbfc6"),
"StudentFirstName" : "Bob",
"StudentLastName" : "Taylor",
"StudentCoreSubject" : [
"MongoDB",
"MySQL",
"SQL Server"
]
}
{
"_id" : ObjectId("5c7ef0f2559dd2396bcfbfc7"),
"StudentFirstName" : "David",
"StudentLastName" : "Johnson",
"StudentCoreSubject" : [
"Compiler",
"Operating System",
"Computer Networks"
]
}Here is the query to find by multiple array items −
> db.findByMultipleArrayDemo.find({ StudentCoreSubject: { $all: ["Compiler", "Computer Networks"] }}).pretty();The following is the output displaying record with array items "Compiler" and "Computer Networks −
{
"_id" : ObjectId("5c7ef07b559dd2396bcfbfc4"),
"StudentFirstName" : "John",
"StudentLastName" : "Smith",
"StudentCoreSubject" : [
"Compiler",
"Operating System",
"Computer Networks"
]
}
{
"_id" : ObjectId("5c7ef0f2559dd2396bcfbfc7"),
"StudentFirstName" : "David",
"StudentLastName" : "Johnson",
"StudentCoreSubject" : [
"Compiler",
"Operating System",
"Computer Networks"
]
}
Updated on: 30-Jul-2019
749 Views
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