===== Select Columns =====

This transformation removes all columns except the selected ones.

EXAMPLE

**Source table:** The longest rivers in the world

^  River  ^  Length (km)  ^  Length (miles)  ^  Continent  ^
| Nile  |  6650  |  4132  |  Africa  |
| Amazon  |  6400  |  3976  |  South America  |
| Yangtze  |  6300  |  3917  |  Asia  |
| Mississippi  |  6275  |  3902  |  North America  |


**Objective:** Keep the first two columns in the table. Remove all other columns.

**Transformation parameters:**

  * Columns to select: River; Length (km)
  
**Output table:**

^  River  ^  Length (km)  ^
| Nile  |  6650  |
| Amazon  |  6400  |
| Yangtze  |  6300  |
| Mississippi  |  6275  |

=== See also ===
  * [[transformations:remove|Remove Columns]]