Hi SQL experts,
I've got a question here, is that possible to implement a window function without aggregation? Any SQL could get below desired result?
For example:
Table input
date | id
------------+--------
2014-04-26 | A
2014-05-03 | B
2014-05-10 | C
2014-05-17 | D
2014-05-24 | E
2014-05-31 | F
Expected output, use 2 week roll up as an example:
date | id
------------+--------
2014-04-26 | A
2014-05-03 | A
2014-05-03 | B
2014-05-10 | B
2014-05-10 | C
2014-05-17 | C
2014-05-17 | D
2014-05-24 | D
2014-05-24 | E
2014-05-31 | E
2014-05-31 | F
Thanks,
Suya