In this SQL tutorial, you’ll learn how to use the UNION ALL operator to combine the results of multiple SQL queries. Unlike the regular UNION operator, UNION ALL returns all rows, including duplicates, from the SELECT queries. This makes it an ideal choice for scenarios where you need to preserve all data, regardless of duplication. […]
In this SQL tutorial, we’ll explore how to summarize data effectively using the HAVING clause and correlated subqueries. Learn how to filter aggregated results, apply conditions to grouped data, and use subqueries that dynamically adjust based on the outer query. Perfect for beginners and advanced SQL learners alike! 📌 Topics Covered: ✅ Understanding the HAVING […]
For Complete Source: visit https://www.businessintelligence.bi/2025/03/05/sql-correlated-sub-query-explained-fetch-employees-with-above-average-salary-using-ctes/ In this video, we break down an advanced SQL query step by step! Learn how to use Common Table Expressions (CTEs) to fetch the latest salary and department of employees, filter out those earning above the department’s average salary, and optimize queries using ROW_NUMBER() and JOINs. Perfect for SQL learners […]
A Common Table Expression (CTE) is the result set of a query which exists temporarily and for use only within the context of a larger query. Learn how to write an SQL query to retrieve the latest pay rate and department for employees. This tutorial covers key SQL techniques such as JOIN, GROUP BY, and […]
Learn how to combine data from multiple tables in SQL using JOINs. In this detailed tutorial, we’ll walk you through SQL JOINs and show you how to use them to efficiently merge data from related tables. Throughout this video, we’ll provide clear, real-world examples to help you understand how each JOIN type works and how […]
Unlock the Power of DAX! In this tutorial, we dive deep into the REMOVEFILTERS and VALUES functions in Power BI. These two powerful DAX functions allow you to manipulate filters and return unique values, helping you create more dynamic and flexible reports. 🔹 What You’ll Learn: ✅ How REMOVEFILTERS removes context filters in calculations ✅ […]
Want to level up your SQL skills? In this tutorial, we break down Subqueries and Joins step by step, helping you understand when and how to use them efficiently. Whether you’re a beginner or an experienced SQL user, this video will enhance your database query skills. 🚀 What You’ll Learn: ✅ What are Subqueries & […]
How to Enable “Show Items with No Data” in Power BI for Complete Time-Based Reporting In Power BI, many companies and end-users want to see all months in a report, regardless of whether data is available for each one. For instance, management may require insights across a full fiscal year, even for months with no […]
Video on Relational Databases Master SQL Databases with MS Access: A Step-by-Step Tutorial -https://youtu.be/0Qg6-kxQbyQ Learn Sql Databases using MS Access – An end-to-end project covers Referential Integrity, SQL & more https://youtu.be/0Qg6-kxQbyQ Video on Table Join SQL for Data Analysis: Selecting & Joining Data from Multiple Tables! https://youtu.be/fXsQvTc62FU Description: Want to take your SQL skills to […]
In this video, we break down SQL’s GROUP BY, ORDER BY, and Aggregate Functions with simple explanations and real-world examples. Whether you’re a beginner or looking to sharpen your SQL skills, this tutorial covers everything you need to know! 📌 Topics Covered: ✅ What is GROUP BY in SQL? ✅ How ORDER BY Works with […]
