When you receive the error “subquery returns more than 1 row,” it means that a subquery in your SQL query is returning multiple rows, but the SQL statement expects only one row to be returned. This can...
Working With Subqueries
SQL subqueries are a powerful tool in the world of database management. A subquery is a query within a query, used to retrieve data from one or more tables and then use that data in the main query. Subqueries can be...
How to Extract Data from a Table in SQL?
Structured Query Language (SQL) is a widely-used programming language that allows users to interact with Relational Database Management Systems (RDBMS). It provides a set of commands, statements, and clauses that enable...
Write a program to calculate the factorial of a given number
Calculating the factorial of a given number is a common programming problem that tests the ability to implement basic mathematical concepts and logical structures. In this article, we will discuss how to write a program...
How can I validate an email address in JavaScript
Email validation is a crucial part of any web application or website that collects user data. By validating the email address, you can ensure that the data you collect is accurate and useful. JavaScript is a popular...
How do you pause and resume threads in Java Programming
Based on the requirements sometimes you might want to suspend, resume or stop a thread. For doing such operations on a thread, before Java 2, thread API used to contain suspend()...
How to Dynamically Dispatch a Method in Java Programming
In this article we will look at dynamic method dispatch in Java which is a way to provide run-time polymorphism. Section 1: Introduction Java is an object-oriented programming language that supports dynamic programming...
How to read and write QR code using java
Quick Response Code (QR Code) is a two-dimensional matrix like barcode, designed by a subsidiary of Toyota to mark their vehicles for tracking in their manufacturing facilities. This is nothing but a type of barcode...
Palindrome Number in Python using Function
Here’s an example Python function that checks if a number is a palindrome or not: def is_palindrome(num): """ Returns True if num is a palindrome, False otherwise """ # Convert the number to a string str_num =...
How to make a calculator in java using swing
In this article I am going to demonstrate how to make a calculator in Java. Below I have shared the simple calculator program in java using swing. It is a simple calculator in Java which can perform basic...
An introduction to Multi-Threading in Java
In this article we will learn what is multithreading and how to create and use threads in Java programs. Background Information Multitasking: Ability to execute two or more tasks in parallel or simultaneously is...
How to create a Login form using java applets
Many scripting languages like PHP give a better support to login forms, but when you are looking for a secure and more sophisticated login into your website we prefer the applet login it will make sure...