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MongoDB: combining AND and OR?
Let us first create a collection with documents −
> db.demo293.insertOne({FirstName:"Chris",LastName:"Brown",Age:24});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4d45075d93261e4bc9ea32")
}
> db.demo293.insertOne({FirstName:"David",LastName:"Miller",Age:23});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4d45265d93261e4bc9ea33")
}
> db.demo293.insertOne({FirstName:"John",LastName:"Smith",Age:24});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4d45385d93261e4bc9ea34")
}
> db.demo293.insertOne({FirstName:"Adam",LastName:"Doe",Age:21});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4d46cf5d93261e4bc9ea35")
}Display all documents from a collection with the help of find() method −
> db.demo293.find();
This will produce the following output −
{ "_id" : ObjectId("5e4d45075d93261e4bc9ea32"), "FirstName" : "Chris", "LastName" : "Brown", "Age" : 24 }
{ "_id" : ObjectId("5e4d45265d93261e4bc9ea33"), "FirstName" : "David", "LastName" : "Miller", "Age" : 23 }
{ "_id" : ObjectId("5e4d45385d93261e4bc9ea34"), "FirstName" : "John", "LastName" : "Smith", "Age" : 24 }
{ "_id" : ObjectId("5e4d46cf5d93261e4bc9ea35"), "FirstName" : "Adam", "LastName" : "Doe", "Age" : 21 }Following is the query to combine AND and OR −
> db.demo293.find( {
... $and : [
... {
... $or : [
... {"FirstName" : "John"},
... {"LastName" : "Brown"}
... ]
... },
... {
... Age:24
... }
... ]
...} )This will produce the following output −
{ "_id" : ObjectId("5e4d45075d93261e4bc9ea32"), "FirstName" : "Chris", "LastName" : "Brown", "Age" : 24 }
{ "_id" : ObjectId("5e4d45385d93261e4bc9ea34"), "FirstName" : "John", "LastName" : "Smith", "Age" : 24 }
Updated on: 31-Mar-2020
495 Views
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