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Update the last row with search criteria in MongoDB?
To update with search criteria, use findAndModify() in MongoDB. Let us create a collection with documents −
> db.demo516.insertOne({"Name":"John","Age":22,"Score":56});{
"acknowledged" : true,
"insertedId" : ObjectId("5e889fdb987b6e0e9d18f591")
}
> db.demo516.insertOne({"Name":"John","Age":23,"Score":67});{
"acknowledged" : true,
"insertedId" : ObjectId("5e889ff1987b6e0e9d18f592")
}
> db.demo516.insertOne({"Name":"John","Age":22,"Score":56});{
"acknowledged" : true,
"insertedId" : ObjectId("5e889ff3987b6e0e9d18f593")
}
> db.demo516.insertOne({"Name":"John","Age":22,"Score":66});{
"acknowledged" : true,
"insertedId" : ObjectId("5e889ffa987b6e0e9d18f594")
}
Display all documents from a collection with the help of find() method −
> db.demo516.find();
This will produce the following output −
{ "_id" : ObjectId("5e889fdb987b6e0e9d18f591"), "Name" : "John", "Age" : 22, "Score" : 56 }
{ "_id" : ObjectId("5e889ff1987b6e0e9d18f592"), "Name" : "John", "Age" : 23, "Score" : 67 }
{ "_id" : ObjectId("5e889ff3987b6e0e9d18f593"), "Name" : "John", "Age" : 22, "Score" : 56 }
{ "_id" : ObjectId("5e889ffa987b6e0e9d18f594"), "Name" : "John", "Age" : 22, "Score" : 66 }
Following is the query to update the last row with search criteria in MongoDB −
> db.demo516.findAndModify({
... query: {Name: "John", Age: 22},
... sort: {_id: -1},
... update: {$set: {Score: 98}},
... new: true
... })
{
"_id" : ObjectId("5e889ffa987b6e0e9d18f594"),
"Name" : "John",
"Age" : 22,
"Score" : 98
}
Display all documents from a collection with the help of find() method −
> db.demo516.find();
This will produce the following output −
{ "_id" : ObjectId("5e889fdb987b6e0e9d18f591"), "Name" : "John", "Age" : 22, "Score" : 56 }
{ "_id" : ObjectId("5e889ff1987b6e0e9d18f592"), "Name" : "John", "Age" : 23, "Score" : 67 }
{ "_id" : ObjectId("5e889ff3987b6e0e9d18f593"), "Name" : "John", "Age" : 22, "Score" : 56 }
{ "_id" : ObjectId("5e889ffa987b6e0e9d18f594"), "Name" : "John", "Age" : 22, "Score" : 98 }
Updated on: 2020-05-13T07:06:42+05:30
384 Views
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