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    Answers and rating deltas for
    How to count number of rows in a spark dataframe based on a value (primary key) from another datafra
| Author | Votes | Δ | 
|---|---|---|
| Raphael Roth | 1 | +1.88 | 
| Ramesh Maharjan | 0 | -1.88 | 
Last visited: Dec 3, 2017, 2:09:25 PM