To get the database data size in MongoDB, you can use stats() method. The syntax is as follows −db.stats();Let us use the database with the name ‘test’.Now, check the current database with the help of the following query −> db;The following is the output −testHere is the query to get ... Read More

Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to ... Read More

You can use the aggregate framework to find duplicate records in MongoDB. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.findDuplicateRecordsDemo.insertOne({"StudentFirstName":"John"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5c8a330293b406bd3df60e01") } > db.findDuplicateRecordsDemo.insertOne({"StudentFirstName":"John"}); ... Read More

There is no in-built function to count a number of keys in a document. In order to count a number of keys, you need to write some code.Let us create a collection with a document. The query to create a collection with a document is as follows −> db.numberofKeysInADocumentDemo.insertOne({   ... Read More

To fetch the value from a LabelValue class in Java, you need to use the getValue() method. To get the key, use the getLabel() method. Let us first see what we need to work with JavaTuples. To work with LabelValue class in JavaTuples, you need to import the following package ... Read More

Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to ... Read More

Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to ... Read More

Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to ... Read More

Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to ... Read More

To retrieve a value from MongoDB by its key name, use the following syntax −db.yourCollectionName.find({}, {"yourFieldName":1}).pretty();To understand the above syntax, let us create a collection with the document. The query to create a collection with a document is as follows −> db.retrieveValueFromAKeyDemo.insertOne({"CustomerName":"Larry", "CustomerAge":21, "CustomerCountryName":"US"}); {    "acknowledged" : true,   ... Read More