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George John has Published 1234 Articles
George John
9K+ Views
We can remove FOREIGN KEY constraint from a column of an existing table by using DROP keyword along with ALTER TABLE statement. Syntax ALTER TABLE table_name DROP FOREIGN KEY constraint_name Here constraint name is the name of foreign key constraint which we applied while creating the table. If ... Read More
George John
101 Views
AUTO_INCREMENT means that the column will get the value automatically. To illustrate it we have created a table ‘employees’ as follows − mysql> Show Create Table employees\G *************************** 1. row *************************** Table: employees Create Table: CREATE TABLE `employees` ( `Id` int(11) NOT NULL AUTO_INCREMENT, ... Read More
George John
122 Views
Yes, an array can be returned from a java function. See the example below − Example public class Tester { public static void main(String[] args) { int[] array = getData(); for(int i: array) { System.out.println(i); } } public static int[] getData() { int[] dataArray = {1, 2, 3, 4}; return dataArray; } } Output 1 2 3 4
George John
282 Views
As we know that the default MySQL database would be the database that is currently in use for subsequent queries. We can get the list of tables in that database by using SHOW TABLES statement. mysql> SHOW TABLES; +------------------+ | Tables_in_sample | +------------------+ | employee ... Read More
George John
5K+ Views
Page redirection is a situation where you clicked a URL to reach a page X but internally you were directed to another page Y. It happens due to page redirection. To redirect URL to a different website after few seconds, use the META tag, with the content attribute. The attributes ... Read More
George John
2K+ Views
A semicolon after a close brace is mandatory if this is the end of a declaration. In case of braces, they have used in declarations of class, enum, struct, and initialization syntax. At the end of each of these statements, we need to put a semicolon. For example, class ... Read More
George John
129 Views
A favicon is a little icon visible on the web browser tab, just before the page title. It is generally a logo with the smaller size. You need to include a Site Icon in WordPress to add a favicon to your WordPress site. Login to your WordPress website and from ... Read More
George John
11K+ Views
We can check whether a particular String is empty or not, using isBlank() method of the StringUtils class. This method accepts an integer as a parameter and returns true if the given string is empty, or false if it is not. Example Live Demo import org.apache.commons.lang3.StringUtils; public ... Read More
George John
166 Views
Program comments are explanatory statements that you can include in the C++ code. These comments help anyone reading the source code. All programming languages allow for some form of comments. C++ supports single-line and multi-line comments. All characters available inside any comment are ignored by C++ compiler. Single line comments ... Read More