# Mastering Tableau: Dimensions, Measures, and Filters
> Learn the fundamentals of Tableau including dimensions vs measures, data extracts, and the order of operations for quick and context filters.

Tags: tableau, data-visualization, business-intelligence, analytics-tutorial, data-science, dashboard-design
## Mastering Tableau Fundamentals
*   An overview of core Tableau concepts for technical presentations and dashboards.

## Dimensions vs. Measures
*   **Dimensions:** Qualitative fields (WHO, WHAT, WHERE) displayed in blue. Used for headers and grouping data.
*   **Measures:** Quantitative fields (HOW MUCH) displayed in green. Used for aggregations like SUM, AVG, and calculation axes.

## Data Sources and Extracts
*   **Live Connection:** Real-time data refresh from Excel, SQL, or Google Sheets.
*   **Extract (.hyper):** A local static snapshot that offers faster performance on large datasets and offline access.

## Understanding Tableau Filters
*   **Quick Filters:** Interactive controls (dropdowns, sliders) for user-driven data slicing.
*   **Context Filters:** High-priority filters that create independent temp tables, essential for accurate 'Top N' analysis.

## Practical Use Case: Retail Sales
*   A walkthrough of building a retail dashboard: connecting to Excel, creating a .hyper extract, and using dimensions like Region to visualize Sales performance with interactive filtering.
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