# 🧊 Modelling - [Intro to the Canvas](https://resources.less.tech/less-tech/modelling/intro-to-the-canvas.md): The Canvas is where you'll be building workflows. The video below provides a brief overview of the core functionality. - [Action Guides](https://resources.less.tech/less-tech/modelling/action-guides.md) - [Basics](https://resources.less.tech/less-tech/modelling/action-guides/basics.md) - [Input](https://resources.less.tech/less-tech/modelling/action-guides/basics/input.md): Bring data to the Canvas - [Output](https://resources.less.tech/less-tech/modelling/action-guides/basics/output.md): Store the output of your workflow as a new table - [Fill](https://resources.less.tech/less-tech/modelling/action-guides/basics/fill.md): Handle nulls or empty cells in your data set - [Filter](https://resources.less.tech/less-tech/modelling/action-guides/basics/filter.md): Make rules that removes rows - [Formats](https://resources.less.tech/less-tech/modelling/action-guides/basics/formats.md): Change the data format of columns - [Limit](https://resources.less.tech/less-tech/modelling/action-guides/basics/limit.md): Reduce the number of rows in your data set - [Rename](https://resources.less.tech/less-tech/modelling/action-guides/basics/rename.md): Rename your columns - [Replace](https://resources.less.tech/less-tech/modelling/action-guides/basics/replace.md): Replace text values in one or multiple columns - [Pick](https://resources.less.tech/less-tech/modelling/action-guides/basics/pick.md): Select the columns you want to keep - [Sort](https://resources.less.tech/less-tech/modelling/action-guides/basics/sort.md): Sort your data - [Text Transform](https://resources.less.tech/less-tech/modelling/action-guides/basics/text-transform.md): Change how your text columns looks - [Unique](https://resources.less.tech/less-tech/modelling/action-guides/basics/unique.md): Remove duplicates - [New Columns](https://resources.less.tech/less-tech/modelling/action-guides/new-columns.md) - [Compare](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/compare.md): Move values vertically - [Cumulative](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/cumulative.md): Perform cumulative calculations - [Date Difference](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/date-difference.md): Calculate difference in time between two dates - [Date Format](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/date-format.md): Extract date formats from date - [Date Math](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/date-math.md): Add or subtract days, seconds or hours from existing date columns - [Difference](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/difference.md): Vertically calculate the difference between rows - [Calculate](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/calculate.md): Calculate your way to new columns - [IF Column](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/if-column.md): Create new columns with conditions - [Text Column](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/text-column.md): Create new text columns - [Parse JSON](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/parse-json.md): Convert nested JSON to new columns - [Row ID](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/row-id.md): Add a Row ID column to your dataset - [Running Interval](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/running-interval.md): Perform interval calculations - [Split Columns](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/split-columns.md): Split columns to rows or columns by a delimiter - [Reshape](https://resources.less.tech/less-tech/modelling/action-guides/reshape.md) - [Pivot](https://resources.less.tech/less-tech/modelling/action-guides/reshape/pivot.md): Convert rows to columns - [Group By](https://resources.less.tech/less-tech/modelling/action-guides/reshape/group-by.md): Put data in categories and perform math within groups - [Transpose](https://resources.less.tech/less-tech/modelling/action-guides/reshape/transpose.md): Turn columns into rows - [Merge](https://resources.less.tech/less-tech/modelling/action-guides/merge.md) - [Append](https://resources.less.tech/less-tech/modelling/action-guides/merge/append.md): Add columns from one table to another (cross-join, cartesian join, etc.) - [Combine](https://resources.less.tech/less-tech/modelling/action-guides/merge/combine.md): Combine two different tables into a unified data set - [Stack](https://resources.less.tech/less-tech/modelling/action-guides/merge/stack.md): Merge data set by stacking them on top of each other --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://resources.less.tech/less-tech/modelling.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.