Question

I have a table with engineer name and the date as a float.

i did the following

select t.eng_id, t.createdat
from JOBS t 
where t.ENG_ID in (SELECT ENG_NAME From HOSEFLEX.ENGINEERS) 

which got me

1   bungle  40767.8305520833
2   bungle  40767.7657221412
3   Shaun   40825.6510914583
4   Shaun   40767.8287994213
5   Shaun   40825.6041891204
6   Shaun   40908.8024086458

i converted the float to a year month

select eng_id,
      TO_CHAR( to_date('12/30/1899', 'MM/DD/YYYY') + t.createdat , 'YYYY-MON')
from JOBS t

which got me

1   bungle  2011-AUG
2   bungle  2011-AUG
3   Shaun   2011-OCT
4   Shaun   2011-AUG
5   Shaun   2011-OCT
6   Shaun   2011-DEC

but what i want is a count of entries for each engineer per month

Eng Name  2011-Aug 2011-OCT 2011-DEC
bungle     2        0        0
Shaun      1        2   

and if its possible i would like to be able to set that start and end date to filter on

Thanks in advance

Answer 1

Short answer — you can use group by on calculations. So you can use NVL and case/when as well as other calculations and functions.