Smart Data Correction in T-SQL – Fixing Gender Data Entry Mistakes in Database
Use Case: When Gender Information Gets Flipped! Imagine a scenario where a bug in the front-end application caused a complete…
SQL Mathematica – How to get the Area & Circumference of a Circle
This simple stored procedure calculates the area & circumference of a circle using radius—an ideal example for beginners. It’s designed…
SQL Mathematica – How to get the Area of Rectangle
This simple stored procedure calculates the area of a rectangle using length and breadth—an ideal example for beginners. It’s designed…
Power BI – Internal Query Processing Architecture
This architecture diagram illustrates the internal flow of a DAX query within Power BI—from query generation to data retrieval and…
SQL Server – Why SET NOCOUNT ON Should Be in Every Stored Procedure
SET NOCOUNT ON is a SQL Server command that stops the message showing how many rows were affected by a…
Key Difference between Relational & OLAP Reporting
Feature Relational OLAP Data Access Generalized access 1) Relational table(s)2) Transactional or Summary Table(s) Multi-dimensional (cross-tab) presentation only1) Dimensions &…
How to Pull User Data from Active Directory Using SQL Server
In enterprise environments, Active Directory (AD) plays a central role in managing users and their credentials. There are many use…
T-SQL – How to get Department-Wise Second Highest Salary (With Ties)
Below is the Employee Table Structure and Sample Data Using Group by & Sub Query
T-SQL Interview Question: How to Find the Second Highest Salary
When it comes to SQL interviews, one of the most commonly asked and deceptively tricky questions is: “How do you…
From Inbox to Insights: Turning Daily Email Reports into Live Dashboards with Power Automate & Power BI
In many enterprises, Learning Management Systems (LMS) play a crucial role in tracking employee training and compliance. But what happens…
Does Primary Key Allow NULL in SQL Server? Let’s Test It
A Primary Key doesn’t allow NULL values because it must uniquely identify each row in the table. If NULLs were…
SQL Server – How Primary Key Ensures Unique Records in Database
In relational databases like SQL Server, MySQL, PostgreSQL, or Oracle, data integrity is crucial. One of the key constraints that…