We know that MySQL SELECT command is used to fetch data from a MySQL table. When you select rows, the MySQL server is free to return them in any order, unless you instruct it otherwise by saying how to sort the result. But, we can sort a result set by ... Read More

When we will add a UNIQUE constraint on the same column multiple times then MySQL will create the index on that column for a number of times we have added the UNIQUE constraint.ExampleSuppose we have the table ‘employee’ in which we have the UNIQUE constraint on ‘empid’ column. It can ... Read More

We can apply the UNIQUE constraint to a column of an existing MySQL table with the help of ALTER TABLE statement.SyntaxALTER TABLE table_name MODIFY colum_name datatype UNIQUE;                     OR ALTER TABLE table_name ADD UNIQUE (colum_name);ExampleSuppose we have the following table named ... Read More

The scope of a variable is the region of your program in which it is defined. JavaScript variables have only two scopes.Global Variables − A global variable has a global scope which means it can be defined anywhere in your JavaScript code.Local Variables − A local variable will be visible ... Read More

The formaction attribute works when let’s say you have two submit buttons in your form and you want both the buttons to work separately. Both the buttons send data to different pages. The formaction attribute overrides the form action attribute.Note − The formaction attribute is not supported in Internet Explorer 9 and earlier ... Read More

In HTML, is used to create buttons in an HTML form. Inside the tag, you can place content like text or images. But, this is not the case with the buttons created with tag.Let’s see an example of button and ,HTML tagIt is used for creating ... Read More

On getting the result of the following, you can find whether a variable is null or undefined. If the result is “false”, it means the variable is null and undefined.Here, the variable results in “True” −                    var age = 10;          if(age) {             document.write("True");          } else {             document.write("False");          }          

If you are only calling a Remote Function Module in SAP system, you don’t require any configuration in SM59.Considering a scenario where your SAP system has to call a function in the C# application, then you need to configure RFC destination using SM59. You can Transaction for defining HTTP destinations- ... Read More

The sort(int[]) method of the java.util.Arrays class sorts the specified array of integer values into ascending numerical order.Exampleimport java.util.Arrays; public class ArrayDemo {    public static void main(String[] args) {       int iArr[] = {2, 1, 9, 6, 4};       for (int number : iArr) { ... Read More

To set the background in JavaScript, use the background property. It allows you to set the background color, image, position, etc.ExampleYou can try to run the following code to learn how to set all the background properties in a single declaration with JavaScript.Live Demo           ... Read More