Add years to query

Question

Hi all,
I have a function collecting years from another table and creating a dynamic sql statement to included all years.
Also I set some variables in the where statement. At the end of the function I use execute immediate.
The issue with this method is time, it's taking almost double the time using execute immediate.
I can provide some data sample if you like.
Thanks in advanced.
Best,

Answer 1

Here is my code:
create table general(
general_id number,
general_type nvarchar2(10),
start_year number,
end_year number,
CONSTRAINT "PK_GENERAL" PRIMARY KEY (general_id)
insert into general(general_id, general_type, start_year, end_year)
values (1, 'data 1', 2009, 2012);
insert into general(general_id, general_type, start_year, end_year)
values (2, 'data 2', 2011, 2015);
create table activity(
activity_id number,
general_id number,
customer_id number,
fy number,
value1 number,
CONSTRAINT "PK_ACTIVITY" PRIMARY KEY (activity_id)
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(1,1,1,2009,10);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(2,1,1,2010,20);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(3,1,1,2011,30);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(4,1,1,2012,40);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(5,1,2,2009,50);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(6,1,2,2010,60);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(7,1,2,2011,70);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(8,1,2,2012,80);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(9,2,1,2011,90);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(10,2,1,2012,100);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(11,2,1,2013,110);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(12,2,1,2014,120);
insert into activity(activity_id,general_id,customer_id,fy,value1)
values(13,2,1,2015,130);
create table rates(
rate_id number,
customer_id number,
fy number,
amount number,
CONSTRAINT "PK_RATES" PRIMARY KEY (rate_id)
insert into rates(rate_id,customer_id, fy, amount)
values(1,1,2009, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(2,1,2010, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(3,1,2011, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(4,1,2012, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(5,1,2013, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(6,1,2014, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(7,1,2015, 0.23);
insert into rates(rate_id,customer_id, fy, amount)
values(8,2,2009, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(9,2,2010, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(10,2,2011, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(11,2,2012, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(12,2,2013, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(13,2,2014, 0.41);
insert into rates(rate_id,customer_id, fy, amount)
values(14,2,2015, 0.41);Here is my select statement:
select
NVL(SUM(CASE WHEN rnk = 1 then nvl(totalAmount, 0) else 0 end),0) year_1, --How to do this line dynamic for all years?
NVL(SUM(CASE WHEN rnk = 2 then nvl(totalAmount, 0) else 0 end),0) year_2,
NVL(SUM(CASE WHEN rnk = 3 then nvl(totalAmount, 0) else 0 end),0) year_3,
NVL(SUM(CASE WHEN rnk = 4 then nvl(totalAmount, 0) else 0 end),0) year_4,
NVL(SUM(CASE WHEN rnk = 5 then nvl(totalAmount, 0) else 0 end),0) year_5,
NVL(SUM(CASE WHEN rnk = 6 then nvl(totalAmount, 0) else 0 end),0) year_6
from (
   select a.fy, a.value1, r.amount, a.value1 * r.amount as totalAmount,
   dense_rank() over (partition by a.general_id order by a.fy ) rnk
   from activity a
   join rates r on r.customer_id = a.customer_id and r.fy = a.fy
   join general g on g.general_id = a.general_id
   where a.general_id = 1
   and a.fy between g.start_year and g.end_year
)Result:
        YEAR_1     YEAR_2     YEAR_3     YEAR_4     YEAR_5     YEAR_6
     22.8              29.2              35.6                42            0             0I hope this help to clarify my issue.
Thanks!
Edited by: user9542267 on Oct 19, 2012 1:20 PM