> For the complete documentation index, see [llms.txt](https://docs-v3.toucantoco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-v3.toucantoco.com/data-management-in-datahub/datasets-in-toucan/preparing-data/overview-of-youprep-tm/reshape/unpivot.md). # Unpivot The Unpivot step allows to to transform columns into rows. It is the reverse operation of a `pivot` step. Unpivoting columns into a unique column means that every unpivoted column header will be used as a label in the output unique column. The columns get unpivoted “around” fixed columns that you can specify. The step creates two new columns: a `variable` column where you can find the labels corresponding to the unpivoted columns headers, and a `value` column where you can find the value for every label. ### Step parameters * `Keep columns...`: the columns to remain fixed, around which the unpivot will occur * `Unpivot columns...`: the columns to be unpivoted * `Drop null values...`: whether to drop rows if their value is null in the output `value` column ### Example **Input**

Reshape - unpivot - input

**Configuration** ```json { "keep": ["COMPANY", "COUNTRY"], "unpivot": ["NB_CLENTS", "REVENUES"], "dropna": true } ``` **Output**

Reshape - unpivot - output

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