You can use $pull operator. Let us first create a collection with documents −> db.pullAnArrayElementDemo.insertOne( { "StudentDetails": [ { "StudentFirstName":"Chris", "StudentScore":56 }, {"StudentFirstName":"Robert", "StudentScore":59 } ] } ); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd3b55bedc6604c74817cd5") }Following is the query to display all documents from a collection with the ... Read More

In C++ or Java we can get the static keyword. They are mostly same, but there are some basic differences between these two languages. Let us see the differences between static in C++ and static in Java.The static data members are basically same in Java and C++. The static data ... Read More

To get the size of all the documents in a query, you need to loop through documents. Let us first create a collection with documents −> db.sizeOfAllDocumentsDemo.insertOne({"StudentFirstName":"John", "StudentSubject":["MongoDB", "Java"]}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cd3c0c1edc6604c74817cd7") } > db.sizeOfAllDocumentsDemo.insertOne({"StudentFirstName":"Larry", "StudentSubject":["MySQL", "PHP"], "StudentAge":21}); {    "acknowledged" : true,   ... Read More

The sizeof function (Sometimes called operator) is used to calculate the size of the given argument. If some other functions are given as argument, then that will not be executed in the sizeof.In the following example we will put one printf() statement inside the loop. Then we will see the ... Read More

To set the text of the label component to be left-justified and bottom-aligned, you need to set the alignment. Set the label to be on the left and bottom aligned −JLabel label = new JLabel("Fav Sports", JLabel.LEFT); label.setVerticalAlignment(JLabel.BOTTOM);Here, we have set the size of the label as well as the ... Read More

Creating an Encrypted LOB(CLOB or, BLOB)Oracle database from 11g onwards provides SecureFiles feature to encrypt the Large object files (LOBs). You can create a secure file using the SECUREFILE keyword as −CREATE TABLE table_name (    myClob CLOB ) LOB(myClob) STORE AS SECUREFILE;You can encrypt a secured file using Encrypt ... Read More

Here we will see what will be the effect of explicit keyword in C++. Before discussing that, let us see one example code, and try to find out its output.Example#include using namespace std; class Point {    private:       double x, y;    public:       ... Read More

This example demonstrate about How to display count of notifications in toolbar icon in Android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.     ... Read More

Let us first create some collections that starts from year number i.e. 2015, 2019, etc −> use web; switched to db web > db.createCollection("2015-myCollection"); { "ok" : 1 } > db.createCollection("2019-employeeCollection"); { "ok" : 1 } > db.createCollection("2015-yourCollection"); { "ok" : 1 }Now you can display all the collections with ... Read More

The java.sql.Types class represents the SQL datatype in integer format. The valueOf() method of the enumeration JDBCType accepts an integer value representing the java.sql.Type and, returns the JDBC type corresponding to the specified value.ExampleLet us create a table with name MyPlayers in MySQL database using CREATE statement as shown below −CREATE ... Read More