Tutorial
Hands-on walkthroughs for SQL, Python, Excel and visualisation tools — every example is runnable, not a screenshot.
109 articles in Tutorial · Page 12 of 13
Tableau LOD Expressions Guide: FIXED, INCLUDE & EXCLUDE
Master Tableau Level of Detail (LOD) expressions. Learn syntax and examples for FIXED, INCLUDE, and EXCLUDE to calculate Percent of Total without filter errors.
Tableau Parameters: Dynamic Filters and Top-N Without Rewriting Formulas
Create Tableau Parameters for dynamic threshold and Top-N RANK filters without rewriting formulas. Slider and list controls.
Tableau Performance and Extracts: Speed Up Dashboards
Speed up Tableau with Hyper extracts and data source filters: choose Extract vs Live and schedule refresh cadence.
Tableau Relationships vs Joins: Which Should You Use & Why?
Compare Tableau Relationships vs Physical Joins. Learn how the logical layer (noodles) stops duplicated rows and inflated sums, and when to use classic joins.
Tableau Story vs Dashboard: What is a Story & How to Use It
Tableau Story vs Dashboard explained: learn what a Story is, how to assemble story points with live-linked dashboards, and when to use presentations (F7).
Tableau Table Calculations: Running Total, Difference and Moving Average
Use Tableau Quick Table Calculations: Running Total, Difference and 14-day Moving Average with continuous dates.
Tableau Tips for Analyst Workflows: URL Actions and Interactivity
Add URL Actions to Tableau dashboards: static vs dynamic links with field injection and browser testing workflow.
Time Series for Analysts: Trend, Seasonality, and the 7-Line Forecast
Decompose trend and seasonality, resample daily to monthly, smooth with rolling windows, and build a naive forecast in Python.
Build AI Agents with LangGraph: From State to Tool-Calling Graph
Build autonomous AI agents with LangGraph and Gemini — state, nodes, edges, tool integration, and a compiled graph you can run locally.