In Power BI, effectively ranking data is crucial for insightful analysis. Two primary DAX functions facilitate this: TOPN and RANKX. While both serve to rank data, they operate differently and are suited for distinct scenarios.
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Category Archives: Data
Hive SQL vs Regular SQL: A Practical Guide for Data Engineers and Analysts
In the world of data processing, SQL is the lingua franca—but not all SQLs are created equal. If you’ve worked with big data tools like Apache Hive, you’ve probably noticed that Hive SQL isn’t exactly the same as traditional SQL used in relational databases like MySQL, PostgreSQL, or SQL Server.
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Power BI UTC Offset by Date with DST Support
When working with datasets containing UTC timestamps, especially across multiple U.S. locations, it’s important to convert UTC time to the correct local time based on time zone and daylight saving time (DST) rules.
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How a WHERE Clause Can Break Your LEFT JOIN — and How to Fix It
TL;DR:
If you’re using a LEFT JOIN but filtering on the right table in the WHERE clause, you might unintentionally turn it into an INNER JOIN. Here’s why that happens, how to fix it, and how different databases handle it.
Promotion vs. Certification in Power BI: What They Mean and When to Use Them
When managing Power BI content like reports and datasets, knowing which ones to trust is critical. Power BI’s promotion and certification features help you highlight and share reliable content within your workspace. But what do these features mean, and how are they different? In this article, we’ll explain promotion vs certification in Power BI, introduce the concept of master data, and show you when to use each.
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How to Create Parallel Set in Tableau
Parallel sets are a visually striking way to represent flows and relationships between categories, offering deeper insights into complex data distributions. In this blog, we’ll guide you step by step on how to create a parallel set visualization in Tableau using the Sample Superstore dataset.
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Mastering Tableau Table Calculations: A Comprehensive Guide
Table calculations in Tableau are powerful tools that allow you to perform computations directly on the aggregated results in your visualization. Unlike calculated fields (which operate at the data source level), table calculations depend on the structure of your table or pane, making them ideal for dynamic, context-aware metrics. In this guide, we’ll break down compute using options, advanced settings like addressing and partitioning, and demonstrate practical examples using Tableau’s Superstore dataset.
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Mastering SQL LEAD and LAG Functions: Advanced Data Analysis
SQL window functions like LEAD and LAG are indispensable tools for business intelligence and data analysis, enabling professionals to uncover trends, track changes, and derive actionable insights. In this guide, we’ll break down how these functions work and demonstrate their real-world applications in SQL-driven analytics.
How to Create Hex Polygon/Tile Grid Maps in Tableau
Hex maps or Tile grip maps are a visually appealing alternative to traditional geographic maps. They arrange regions or states into a grid of hexagons, standardizing their size and shape while maintaining their relative positioning. This approach eliminates distortion caused by geographic size differences and focuses on comparative analysis.
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How to Create Tilted Bar Charts in Tableau
Tilted bar charts, with their unique slanted orientation, offer a fresh perspective for visualizing comparative data. These charts can help your dashboards stand out while providing insightful visual analysis. In this tutorial, we’ll guide you through creating a tilted bar chart in Tableau using the Sample Superstore dataset.
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