Oracle PIVOT月度行数据至12个月度列

Question

I'm querying a table which has data as such:

ACT  CY  GRP   MONTH     AMT
111 CY15 AAA 2015-01-01  2.3
222 CY15 AAA 2015-01-01  3.1 
111 CY15 AAA 2015-02-01 11.5  
222 CY15 AAA 2015-02-01 44.6
111 CY15 AAA 2015-03-01  4.9
222 CY15 AAA 2015-03-01  3.8
222 CY15 AAA 2015-04-01    0  
111 CY15 AAA 2015-04-01 49.8
111 CY15 AAA 2015-05-01    0 
222 CY15 AAA 2015-05-01 83.0
111 CY15 AAA 2015-06-01    0 
222 CY15 AAA 2015-06-01 79.7
111 CY15 AAA 2015-07-01 66.4
222 CY15 AAA 2015-07-01    0 
222 CY15 AAA 2015-08-01 25.5
111 CY15 AAA 2015-08-01 63.1
222 CY15 AAA 2015-09-01 30.4
111 CY15 AAA 2015-09-01 79.7
111 CY15 AAA 2015-10-01 28.0
222 CY15 AAA 2015-10-01 66.4
222 CY15 AAA 2015-11-01 66.4
111 CY15 AAA 2015-11-01 28.3
111 CY15 AAA 2015-12-01 79.7
222 CY15 AAA 2015-12-01 30.5
333 CY16 AAA 2016-01-01 25.4
444 CY16 AAA 2016-01-01 63.1
444 CY16 AAA 2016-02-01 56.4
333 CY16 AAA 2016-02-01 20.2
444 CY16 AAA 2016-03-01 22.4
333 CY16 AAA 2016-03-01 59.8
333 CY16 AAA 2016-04-01 58.7
444 CY16 AAA 2016-04-01 19.5
333 CY16 AAA 2016-05-01 19.6
444 CY16 AAA 2016-05-01 58.7
444 CY16 AAA 2016-06-01 11.7
333 CY16 AAA 2016-06-01 70.4
333 CY16 AAA 2016-07-01 58.7
444 CY16 AAA 2016-07-01 19.5
444 CY16 AAA 2016-08-01 58.7
333 CY16 AAA 2016-08-01 19.3
333 CY16 AAA 2016-09-01 11.3
444 CY16 AAA 2016-09-01 70.4
333 CY16 AAA 2016-10-01 55.7
333 CY16 AAA 2016-11-01 14.3
333 CY16 AAA 2016-12-01 19.3
555 CY15 BBB 2015-01-01 58.7
555 CY15 BBB 2015-02-01 70.4
555 CY15 BBB 2015-03-01 13.6
555 CY15 BBB 2015-04-01 55.7
555 CY15 BBB 2015-05-01 49.8
555 CY15 BBB 2015-06-01 58.7
555 CY15 BBB 2015-07-01 65.9
555 CY15 BBB 2015-08-01 19.0
555 CY15 BBB 2015-09-01 15.9
555 CY15 BBB 2015-10-01 87.9
555 CY15 BBB 2015-11-01 83.5
555 CY15 BBB 2015-12-01 10.7
666 CY16 BBB 2016-01-01 87.9
666 CY16 BBB 2016-02-01 87.9
666 CY16 BBB 2016-03-01 15.4
666 CY16 BBB 2016-04-01 83.5
666 CY16 BBB 2016-05-01 74.7
666 CY16 BBB 2016-06-01 79.1
666 CY16 BBB 2016-07-01 47.9
666 CY16 BBB 2016-08-01 47.9
666 CY16 BBB 2016-09-01 57.5
666 CY16 BBB 2016-10-01 47.9
666 CY16 BBB 2016-11-01 47.9
666 CY16 BBB 2016-12-01 57.5

And I'm trying to display it as follows

GRP CY January February March ... December
AAA 15   5.4     56.1    AMT  ...    AMT
AAA 16   AMT     AMT     AMT  ...    AMT
BBB 15   AMT     AMT     AMT  ...    AMT
BBB 16   AMT     AMT     AMT  ...    AMT

WHERE AMT is the sum of all account amounts for that month in that group and same calendar year.

My first attempt

select * from (select p.grp, p.cy, p.month, p.amt from phasing p WHERE
p.act IN  ('111', '222', '333', '444', '555', '666') ) pivot( sum(amt) 
FOR to_char(to_date(month, 'YYYY-DD-MM'), 'Month')
in 'January', 'February', 'March', 'April')    )

ORA-01738: missing IN keyword

This at least didn't error but I don't always know the Month dates

select * from (select p.grp, p.cy, p.month, p.amt from phasing p WHERE
p.act IN  ('111', '222', '333', '444', '555', '666') ) pivot( sum(amt) 
FOR month in (to_date('2015-01-01', 'YYYY-MM-DD') As Jan, to_date('2015-02-01', 'YYYY-MM-DD') As Feb)    )

I think I need a GROUP BY in my first attempt so that I am not summing all Januarys for every calendar year, but I couldn't even get that to work.

Answer 1

Just use conditional aggregation:

select act, cy,
       sum(case when to_char(month, 'MM') = '01' then amt end) as Jan,
       sum(case when to_char(month, 'MM') = '02' then amt end) as Feb,
       . . .,
       sum(case when to_char(month, 'MM') = '12' then amt end) as Dec
from phasing p
group by act, cy;