T-SQL – SQL Circuit

Building a Lucky Draw System Using SQL Server

Want to randomly pick a winner from a list of participants? Whether you’re running an office contest, event giveaway, or…

In SQL Server, performance isn’t always about major overhauls—it often comes down to the small, smart tweaks. Suppressing unnecessary row…

A Default Constraint in SQL Server is used to automatically assign a default value to a column when no value…

Use Case: When Gender Information Gets Flipped! Imagine a scenario where a bug in the front-end application caused a complete…

This simple stored procedure calculates the area & circumference of a circle using radius—an ideal example for beginners. It’s designed…

This simple stored procedure calculates the area of a rectangle using length and breadth—an ideal example for beginners. It’s designed…

SET NOCOUNT ON is a SQL Server command that stops the message showing how many rows were affected by a…

Below is the Employee Table Structure and Sample Data Using Group by & Sub Query

When it comes to SQL interviews, one of the most commonly asked and deceptively tricky questions is: “How do you…

In relational databases like SQL Server, MySQL, PostgreSQL, or Oracle, data integrity is crucial. One of the key constraints that…

SQL Server Error 3702 is a common roadblock when attempting to drop a database that still has active connections. The…

Deleting a database in SQL Server using a T-SQL script is a quick and efficient method ideal for automation, scripting,…