Tutorial
Hands-on walkthroughs for SQL, Python, Excel and visualisation tools — every example is runnable, not a screenshot.
109 articles in Tutorial · Page 11 of 13
Python Fundamentals Master: Strings, Regex, and Data Structures in 30 Questions
Complete Python fundamentals — slicing, f-strings, regex, lists, dicts, and file handling — 30 questions with explained solutions.
Python String Assignments: 5 Real-World Slicing and Formatting Drills
Practice Python strings on real tasks — email slicer, reverser, cleaner, vowel counter, and f-string formatter with solutions.
Tableau Calculated Fields Tutorial: How to Create & Syntax
Learn how to create calculated fields in Tableau. Master row-level vs aggregate formulas, avoid 'cannot mix aggregate' errors, and use IF/THEN functions.
Tableau Charts for Analysts: Bars, Lines and Scatter Plots That Answer Questions
Choose Tableau charts that answer questions: bars for categories, lines for time and scatters for correlation and outliers.
Tableau Connecting Data Sources: Live vs Extract for Analysts
Connect CSV, Excel and databases in Tableau via the Connections pane and choose Live vs Hyper Extract with data source filters.
Tableau Dashboard Layout Guide: Containers, Tiled & Design
Master Tableau dashboard layout: configure Horizontal & Vertical tiled containers, manage Item Hierarchy, set padding, and choose between Stories vs Dashboards.
Dimensions vs Measures in Tableau: Blue vs Green Pills Guide
Understand Dimensions vs Measures and Discrete vs Continuous in Tableau. Learn why blue pills create headers, green pills create axes, and how to convert them.
Tableau Marks Card Guide: Color, Size, Label & Visual Sorts
Master the Tableau Marks Card: encode data with Color, Size, Label, and Tooltip. Learn how to sort marks, control gradients, and format clean visual charts.
Tableau Scatter Plots: Correlation and Outliers for Analysts
Build Tableau scatter plots for correlation and outliers: map Sales vs Profit, add Detail, Size, Color and fix overplotting.