Affects Version/s: None
Fix Version/s: None
old issue number:291
Support an aggregate function that generates an interpolated value that, if added to the group, would correspond to the percentile given
SELECT PERCENTILE_CONT(<percentile>) WITHIN GROUP (ORDER BY <expression> ASC)
The PERCENTILE_CONT function would return the same type as <expression>. See [here](http://my.safaribooksonline.com/book/databases/sql/9780596155322/ansi-sql-aggregate-functions/id3491773_X2ludGVybmFsX0h0bWxWaWV3P3htbGlkPTk3ODA1OTYxNTUzMjIlMkZpZDM0ODkwMjAmcXVlcnk9) for some additional documentation.