April 28, 2026
How to Count Only Weekdays Between Any Two Dates in Tableau (No Excel Needed)
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data analysis
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parameter action
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weekday
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Stop doing this in Excel. Tableau has a cleaner, more powerful way to count only the weekdays between any two dates. And once you see how it works,you'll use it everywhere.
In this tutorial, you'll learn how to build a dynamic date range selector using parameter actions, then strip out Saturdays and Sundays using DATEPART weekday logic wrapped in a Level of Detail expression, so you always get an accurate weekday count, no matter the range.
This is one of the most common questions I get asked, and the solution is simpler than you think.
📥 Download the workbook + data: https://nlt.kit.com/weekdays
April 22, 2026
How to Make Your Worksheet Actions Work on a Dashboard
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data analytics
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data visualization
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next level tableau
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set actions
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tableau tip
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tableau training
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tableau tutorial
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In this video, you'll learn:
- Why worksheet actions break on dashboards
- The exact menu path to find and fix it (Dashboard → Actions → Edit)
- How to switch the source from the worksheet to the dashboard
- How to verify your target set is still correctly configured before closing
Like this? You'll love Next-Level Tableau. Learn more here.
April 17, 2026
Build a Marginal Histogram with Map Layers in One Sheet
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data analytics
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data visualization
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heatmap
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how to
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map layers
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tableau tutorial
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training
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Most Tableau analysts have never heard of a marginal histogram — and even fewer know how to build one. In this video, I'll show you how to create this advanced visualization from scratch on a single sheet using Tableau's map layers feature.
This technique uses the "Flat Earth" concept to treat your entire canvas as a coordinate system, letting you draw fully custom polygon shapes — no extensions, no workarounds. We'll build a heatmap with bar charts on two axes simultaneously, all driven by calculated fields and LOD expressions.
We're using Trump's Truth Social posting data as the dataset, but the technique works with any time-based data you want to analyze by day and hour.
What you'll learn:
- How Tableau's map layers work and why they unlock charts that don't exist natively
- The Flat Earth coordinate system — how to turn any data into drawable polygons
- Building rectangle polygons using 5-point path calculations
- Creating marginal bar charts (vertical + horizontal) on the same sheet
- LOD expressions to normalize bar lengths across dimensions
- Cleaning up the view: hiding headers, labels, and axes for a polished final result
Download the workbook, data and all of the calculations - https://nlt.kit.com/histogram
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