examples/join/output.txt
+------------+-------------+-----------+
| date | sp500 | vix |
+------------+-------------+-----------+
| 2015-03-11 | 2040.23999 | 16.870001 |
| 2015-03-12 | 2065.949951 | 15.42 |
| 2015-03-13 | 2053.399902 | 16.0 |
| 2015-03-16 | 2081.189941 | 15.61 |
| 2015-03-17 | 2074.280029 | 15.66 |
| 2015-03-18 | 2099.5 | 13.97 |
| 2015-03-19 | 2089.27002 | 14.07 |
| 2015-03-20 | 2108.100098 | 13.02 |
| 2015-03-23 | 2104.419922 | 13.41 |
| 2015-03-24 | 2091.5 | 13.62 |
+------------+-------------+-----------+