{{ 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 N number of 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:** Keep the top three longest rivers.\\
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**Table:** The longest rivers in the world (in descending order by length)
^River  ^Length (km)  ^Continent  ^
| Nile  |  6650|Africa  |
| Amazon  |  6400|South America  |
| Yangtze  |  6300|Asia  |
| Mississippi  |  6275|North America  |
| Yenisei  |  5539|Asia  |
| Yellow River  |  5464|Asia  |
| Ob  |  5410|Asia  |
| Paraná  |  4880|South America  |
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**Action parameters:**
> Keep or Remove is "Keep"
> Top or Bottom is "Top"
> Number of rows is "3"
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**Result table:**
^River  ^Length (km)  ^Continent  ^
| Nile  |  6650|Africa  |
| Amazon  |  6400|South America  |
| Yangtze  |  6300|Asia  |

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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]]