An aggregate function in SQL performs a calculation on a set of values and returns a single value. Common aggregate functions include COUNT(), SUM(), AVG(), MAX(), and MIN(). Examples of Aggregate Functions: Assume we have the following employees table: 1. COUNT(): Returns the number of rows that match a specified condition. Result: total_employees —————- 5…
Text functions in SQL, also known as string functions, are functions that perform operations on string data types (such as CHAR, VARCHAR, and TEXT). These functions allow you to manipulate and query string values in various ways, such as concatenating strings, extracting substrings, converting case, replacing substrings, and more. Text functions are essential for handling…
A stack in C++ is a data structure that follows the Last In, First Out (LIFO) principle. This means that the last element added to the stack will be the first one to be removed. Think of it like a stack of plates: you add new plates to the top of the stack, and when…
A linked list in C++ is a linear data structure storing elements in separate objects called nodes. Each node contains two parts: data and a pointer(reference) to the next node in the sequence. This structure allows for the Linked List’s dynamic memory allocation, insertion, and deletion operations. Linked List Program in C++ Here’s an example…
Here, we will write a program to upload a file in node js. We will use multer library to perform the function. app.js file upload.ejs file in views directory
Here, we will write a program to create http module to transfer data over the hyper text transfer protocol. app.js file
Here, we will write a program to create forgot password link. We will also create a reset password page where the user can set the new password. We will use node mailer to send the reset password link to the user. app.js forgot-password.ejs file in views directory Reset-password.ejs file in views directory
Here, we will write a code to send e-mail using node js. For this we will require the necessary libraries and use node mailer to performe the function app.js file