{{ transformations:TrimTableAction.png}}
====== TRIM TABLE ======
Category: Transform / Filters\\

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=====Description=====
This action keeps or removes the first or last N rows.\\

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=====Use cases=====
  *Keep only the top N significant items (e.g. top 10 products by sales volume) for a report or dashboard.
  *Reduce the size of a larger dataset to a specific number of rows during the initial build of a workflow.  Remove or disable the //Trim table// action when the workflow is complete, to process the entire dataset.
  *Remove extraneous metadata from the top or bottom of a dataset.\\

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=====Action settings=====
^Setting ^Description ^
|Keep only/Remove|Select whether rows will be kept or removed.|
|Top/Bottom|Select whether the rows at the top or bottom of the table will be kept/removed.|
|N rows<sup>*</sup>|Enter/Select the number of rows to keep/remove.|
<sup>*</sup> Setting can be specified using a [[:parameters|parameter]].

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=====Examples=====

====Example #1====
>Remove the 2 rows of metadata (heading and underline) from the top of the table.

===Before (source table)===
^Mountain ^Height (m)  ^
|**//Tallest Mountains//**|  |
|-------------------------|  |
|Mt. Everest  |  8848.86|
|K2   |  8611|
|Kangchenjunga  |  8586|

===After (result table)===
^Mountain ^Height (m)  ^
|**Mt. Everest**  |  **8848.86**|
|**K2**   |  **8611**|
|**Kangchenjunga**  |  **8586**|

===Action parameters===
>Keep only/Remove:  Remove
>Top/Bottom:  Top
>N rows: 2

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====Example #2====
>Keep the top 3 rows of the table and remove the rest.

===Before (source table)===
^Mountain ^Height (m)  ^
|Mt. Everest  |  8848.86|
|K2   |  8611|
|Kangchenjunga  |  8586|
|Lhotse  |  8516|
|Makalu  |  8485|
|Cho Oyu  |  8188|

===After (result table)===
^Mountain ^Height (m)  ^
|**Lhotse**  |  **8516**|
|**Makalu**  |  **8485**|
|**Cho Oyu**  |  **8188**|

===Action parameters===
> Keep only/Remove: Keep
> Top/Bottom: Bottom
> N rows: 3

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=====Community examples=====
  * [[https://community.easymorph.com/t//1312/2|A way to obtain all positions of a char in text]] ([[https://community.easymorph.com/uploads/short-url/2lIBiIZXyCaizzyOl1nTkfleYfL.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Table 2//; Action position: //3//)
  * [[https://community.easymorph.com/t//1870/4|Send email - Add table extract to outlook email message]] ([[https://community.easymorph.com/uploads/short-url/xnfDuDCTN6iJgA4pEcQQsRIZET3.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Input dataset with prepended headers row//; Action position: //2//)
  * [[https://community.easymorph.com/t//1972/2|Read Data with two line header]] ([[https://community.easymorph.com/uploads/short-url/4YFQxslIv3pmgtF2eRywf4wpcFQ.morph|Project]]; Module: //Main//; Group: //Tab 1//; Table: //Read, Mark groups//; Action position: //2//)
  * [[https://community.easymorph.com/t//2185/4|Transform parsed JSON to right format]] ([[https://community.easymorph.com/uploads/short-url/z1JsbbyueYletNwNg1VlSef2C4C.morph|Project]]; Module: //Main//; Group: //Group 1//; Table: //Imported table 1.dset//; Action position: //4//)

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=====See also=====
  * [[transformations:keepremovematching|Keep/remove matching]]
  * [[transformations:trimbycondition|Trim table by condition]]