Video | Sigma | Data visualisation | Tool strategy

Sigma analytics walkthrough: building a dashboard from scratch

Sigma isn't Tableau with a new coat of paint - it's a lineage-obsessed philosophy that takes some unlearning.

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  • Sigma centralises data connections so users pick from curated sources rather than creating new connections ad hoc
  • Elements (tables, charts) can be reused and layered via lineage, letting you apply changes at different levels without affecting upstream data
  • Creating a hidden 'data page' per page is a practical pattern for managing lineage cleanly on larger builds
  • Formatting, padding, margins and borders in Sigma are detailed and easy to apply consistently by copying formatting between elements
  • Interactivity (controls, actions, popovers, modals, drawers) is more manual to set up than Tableau's filter actions but enables richer custom behaviour

Sigma is a cloud BI tool built around centralised data connections and strict data lineage, and this walkthrough builds a workbook from scratch to show how that philosophy changes the way you work compared with Tableau or Power BI.

Recorded in a sandbox environment given through Sigma's influencer programme, using a Superstore-style sample dataset in Snowflake; not sponsored.

Part By Part

Data connections

How you get data into a Sigma workbook.

  • Centralised, curated connections 5:01

    There is no per-user connection window; admins and data engineers set up connections centrally and you just pick from what you have access to, which stops connection sprawl but means you depend on the suggested source list, which reorders based on your recent activity.

  • Connecting to an existing element 6:26

    You can build a new table or chart directly from an element already in the workbook rather than only from a raw source, which avoids some of the complex workarounds (like LODs) you'd reach for in Tableau or Power BI.

  • Ad hoc data when needed 8:39

    If a curated source is missing something, you can still add a connection or bring in CSV/SQL and do your own prep, it's just not the default path.

    My video on: Copy into

Lineage and elements

Sigma's model of how tables and charts relate to each other and to the data behind them.

  • Lineage view 7:54

    Every data source and the elements built from it show up in a visual lineage map, so you can see exactly what depends on what, something Tim says he wishes Tableau had.

  • Hidden data page per page 9:20

    Creating a page that's never shown to users, and a dedicated 'data page' copy of your tables on each page, lets you apply changes centrally at the data-source level or locally at the page level without one affecting the other.

  • Changes only flow downstream 11:20

    A calculation or aggregation made on a table at one level in the lineage doesn't propagate upstream, only downstream, so building out this hierarchy deliberately avoids rework later on bigger builds.

Charts and visuals

The core chart-building workflow once data elements are in place.

  • Bar and donut charts 12:11

    You pick an element as the source, then drag fields onto axes or value/colour wells; formatting options like data labels and percentage display are set from a panel on the right.

  • Tables with column control 14:36

    Tables let you hide or deselect columns per tab without affecting the same table used elsewhere, which is where the per-page lineage pattern pays off.

  • Region map 15:45

    A region map just needs a geographic field and a measure; colouring by scale rather than by category gives a proper choropleth shaded by value.

  • KPI cards 19:21

    KPI cards take a value and a date field, support timelines and configurable comparisons, though Tim suggests dedicated metrics features are often a better fit than building these manually, as in Tableau.

Layout and formatting

Controls for arranging and styling a dashboard canvas.

  • Grid-based layout 13:00

    Elements snap to a grid and you can drag a line to shift everything beneath it up or down, or shift-select multiple elements to resize them together.

  • Canvas width and background 16:49

    You can trim empty space, set the canvas to full width, large or medium, and switch the background between light and dark themes.

  • Padding, margin and borders 18:01

    Each element has detailed styling for inside padding, outside margin, corner rounding and borders, letting you give charts a consistent contrast border to make them stand out.

  • Copy formatting between elements 18:23

    Right-click to copy an element's formatting and paste it onto others, so you style one chart once and apply it consistently across the dashboard.

Layout containers and UI elements

Additional structural and interface components beyond basic charts.

  • UI building blocks 21:02

    Text, images, buttons, dividers, page breaks, value lists and progress rings are available as standalone UI elements, alongside controls that act like filters.

  • Drawers, popovers and modals 21:21

    These let you tuck extra content behind a click, for example a modal summary view with a link through to a more detailed dashboard, giving richer navigation without extra tabs.

Interactivity (actions)

How clicking one element affects others, set up manually rather than as a built-in filter action.

  • Turning a field into a control 23:40

    Clicking a chart's field and choosing 'add a control' creates a control bound to that column, which starts out doing nothing until you wire up an action.

  • Set control value on select 24:22

    In the Actions tab you define an on-select action that sets the control's value to the clicked column, which is what actually drives the filtering behaviour.

  • Adding targets 25:00

    By default a control only affects itself; you add other charts on the page as targets so a click propagates across the dashboard, which Tim says is more manual than Tableau's filter actions but opens up more custom behaviour.

Admin panel

Where environment-wide settings and governance live.

  • Centralised connection management 28:01

    Admins create and manage connections here, choosing the connection type, which is what feeds the curated source lists users see when building workbooks.

  • Usage and user management 28:41

    The panel also covers usage, teams, account types and user attributes for governing who can do what across the environment.

Worth Knowing
  • Tim recommends investing most of your time in the data model before building workbook assets, since getting that right makes the workbook itself quick to build.
  • The suggested data source list is personalised to recent activity, so it can reorder unexpectedly between sessions.
  • Flat file uploads by users get routed into whatever connection is configured in the admin panel, which can quietly drive extra consumption.
  • Interactivity (controls, actions, targets) is set up manually per element rather than offered as an automatic filter action, so it takes more steps than Tableau but allows more custom behaviour.
Use It When

Useful if you're evaluating Sigma against Tableau or Power BI and want to see the actual build mechanics, or if you're new to Sigma and need your bearings before building your own dashboards.

How this Rollup was made provenance & method

A Rollup is drafted by AI from the video's transcript, then reviewed and edited by Tim. Everything used to produce this one is listed below (the model, the exact prompt, and the source video), so the process is transparent and reproducible.

Transcription
On-device: NVIDIA Parakeet v3 for recent videos, OpenAI Whisper large-v3 for earlier ones. The transcript never leaves the machine or gets published.
Drafting
Claude Sonnet 5 in the cloud, from that transcript.
Prompt
The exact Rollup prompt (v4) , the full system prompt, unedited.
Mode
Overview: organised by the parts of the platform, each with the capabilities covered.
Source video
Watch on YouTube
Drafted
19 October 2026 at 10:15
Reviewed & edited
19 October 2026 at 10:15 · by Tim Ngwena

Model + prompt + video is everything you'd need to recreate a Rollup like this yourself. The one thing we don't share is the transcript.

Rights. The video and its transcript are the property of TN Media Ltd. Unauthorised use or download is prohibited. © TN Media Ltd.

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