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Export specified field of a collection in mongodb / mongodump to file?
To export MongoDB has a command mongoexport. Following is the syntax −
mongoexport -d yourDatabaseName -c yourCollectionName -f yourFieldName --type=csv -o yourFileLocation/FileName;
Let us create a collection with documents −
> db.demo284.insertOne({"FirstName":"Chris"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4abc9e9127fafea82a2cfc")
}
> db.demo284.insertOne({"FirstName":"Robert"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4abca39127fafea82a2cfd")
}
> db.demo284.insertOne({"FirstName":"Bob"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e4abca79127fafea82a2cfe")
}Display all documents from a collection with the help of find() method −
> db.demo284.find();
This will produce the following output −
{ "_id" : ObjectId("5e4abc9e9127fafea82a2cfc"), "FirstName" : "Chris" }
{ "_id" : ObjectId("5e4abca39127fafea82a2cfd"), "FirstName" : "Robert" }
{ "_id" : ObjectId("5e4abca79127fafea82a2cfe"), "FirstName" : "Bob" }Following is the query to export specified field of a collection in mongodb / mongodump to file. We are exporting to the following location “C:\Users\Amit\Desktop\Result;” as shown below −
C:\Program Files\MongoDB\Server\4.0\bin>mongoexport -d test -c demo284 -f FirstName --type=csv -o C:\Users\Amit\Desktop\Result;
This will produce the following output −
2020-02-17T21:49:36.708+0530 connected to: localhost 2020-02-17T21:49:36.712+0530 exported 3 records
Following is the file location for “Result”, whose location is on the Desktop −
The contents are as follows −
Updated on: 31-Mar-2020
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