You will need to use thefind()method to query documents from MongoDB collections. For example, the following statement will retrieve all documents from the collection. Let’s assume you have a collection with a lot of data in a single document. You have theteamscollection, and you will selec...
If the collection does not exist in the database and cannot be appropriately deleted, the result will be false. Use the drop and remove methods to delete a collection from MongoDB. When uninstalling a collection, you must also specify the collection name. Use the drop() Method To delete a...
Method 1: Create a Collection in MongoDB via createCollection() The first way to create a collection is to use the built-increateCollection()database method. There are four different collection types in MongoDB: Standard. The most common collection type. Used for generaldata storage. Capped. ...
MongoDB Setup: Connecting to Data Sources To query document databases, we need to install the MongoDB server. Here are the platform-specific instructions: For Windows, follow the instructions on this link. For Unix-like systems, you can install MongoDB from the terminal: $ sudo apt-get insta...
The database and collection are ready for use. Continue by adding documents to the new database and collection. Method 2: Create a Database in MongoDB Using MongoDB Shell The MongoDB Shell uses commands to create and manage a database. To create a database usingmongosh(MongoDB Shell): ...
how to take value from array from mongodb collection and am using mvc public class PaydeskUser { [BsonId] [BsonRepresentation(BsonType.ObjectId)] public string id { get; set; } [Required] [DataType(DataType.EmailAddress)] public string Email { get; set; } ...
Disk latency– tells you about the write and disk latency, meaning the time needed to start retrieving the data from the disk or writing the data to the disk. If the latency is high, MongoDB will be slower, which can be especially visible if the amount of data is larger than the amoun...
Due to removal I am not able to save the data to mongo collection using putMongo,PutMongoRecord processor. When I checked the log , They are saying to upgrade the mongo-nar in nifi Lib folder. 1. nifi-mongodb-services-nar-1.18.0 2. nifi-mongodb-client-service-api-nar-1.18.0...
import org.springframework.data.mongodb.core.index.Indexed; import org.springframework.data.mongodb.core.mapping.Document; import com.eifesun.monitor.DeviceType; import com.eifesun.monitor.inverter.power_20k.ErrorCode; @Document(collection = "alarm_logs") ...
// For each collection get (find) all the records and forEach on each of them. // Remove the _id field from each record as MongoDB will generate this for you and // you can't have a duplicate. // Save the record. // This assumes that the collection does not have any unique ke...