Coursera Spark SQL MAX COUNT
+-----------+----------+----------+
|color | date|max(count)|
+-----------+----------+----------+
| red|2014-05-26| 5|
| blue|2014-05-26| 3|
| brown|2014-07-31| 2|
| green|2014-08-01| 2|
+-----------+----------+----------+
Helpful Hamster