Differences

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--- transformations:aggregate [2015/04/27 19:51] – elenap
+++ transformations:aggregate [2015/05/01 08:49] – dmitry
@@ Line 25: / Line 25: @@
 | Paraná  |  4880  |  South America  |
-**Objective:** Find out which are the longest rivers on each continent.
+**Objective:** Find out the longest river on each continent.
 **Transformation parameters:**
@@ Line 31: / Line 31: @@
   * Calculate: Length(km)
   * Aggregation: Max
-  * Group by: Continent; River
+  * Group by: Continent
 **Output table:**
@@ Line 37: / Line 37: @@
 ^  River  ^  Continent  ^  Max of Length(km)  ^
 | Nile  |  Africa  |  6650  |
-| Ob  |  Asia  |  5410  |
 | Yangtze  |  Asia  |  6300  |
-| Yellow River  |  Asia  |  5464  |
-| Yenisei  |  Asia  |  5539  |
 | Mississippi  |  North America  |  6275  |
 | Amazon  |  South America  |  6400  |
-| Paraná  |  South America  |  4880  |