Differences

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--- transformations:aggregate [2015/04/10 14:04] – elenap
+++ transformations:aggregate [2015/05/01 08:48] – dmitry
@@ Line 11: / Line 11: @@
   * Max
+EXAMPLE
+**Source table:** The longest rivers in the world
+^  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  |
+**Objective:** Find out which are the longest rivers on each continent.
+**Transformation parameters:**
+  * Calculate: Length(km)
+  * Aggregation: Max
+  * Group by: Continent
+**Output table:**
+^  River  ^  Continent  ^  Max of Length(km)  ^
+| Nile  |  Africa  |  6650  |
+| Yangtze  |  Asia  |  6300  |
+| Mississippi  |  North America  |  6275  |
+| Amazon  |  South America  |  6400  |