update field name in mongodb
// false,true is set for =>{upsert:false, multi:true}
db.foo.update({}, {$rename:{"name.additional":"name.last"}}, false, true);update field name in mongodb
// false,true is set for =>{upsert:false, multi:true}
db.foo.update({}, {$rename:{"name.additional":"name.last"}}, false, true);mongodb update field inside array
Consider the following document in the students collection whose grades element value is an array of embedded documents:
{
_id: 4,
grades: [
{ grade: 80, mean: 75, std: 8 },
{ grade: 85, mean: 90, std: 5 },
{ grade: 85, mean: 85, std: 8 }
]
}
Use the positional $ operator to update the std field of the first array element that matches the grade equal to 85 condition:
IMPORTANT
---------
You must include the array field as part of the query document.
db.students.updateOne(
{ _id: 4, "grades.grade": 85 },
{ $set: { "grades.$.std" : 6 } }
)
After the operation, the document has the following updated values:
{
"_id" : 4,
"grades" : [
{ "grade" : 80, "mean" : 75, "std" : 8 },
{ "grade" : 85, "mean" : 90, "std" : 6 },
{ "grade" : 85, "mean" : 85, "std" : 8 }
]
}mongodb update a data in database
db.Employee.update(
{"Employeeid" : 1},
{$set: { "EmployeeName" : "NewMartin"}});mongodb update
db.collectionName.update({"aField":"vale1"},{$set:{"anotherField":"value2"}})
-search for documentations for more examples than search
-aField is used to find the documents
-anotherField is the field that will be updated
-You can also use the below:
-- updateOne
-- findOneAndUpdateCopyright © 2021 Codeinu
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