PIVOT LOGIC NEEDED

Question

Hi All,
I need to pass the condition as sysdate , sysdate -1 in 'for ' in pivot clause in oracle but am geting the error as 'ORA-56901: non-constant expression is not allowed for pivot|unpivot values' . I need to pass condition as sysdate only not any hard code vlaue. is it possible?
create table pivot_eg ( due_dt date);
insert into pivot_eg values ('16-mar-11');
insert into pivot_eg values ('15-mar-11');
insert into pivot_eg values ('14-mar-11');
insert into pivot_eg values ('13-mar-11');
insert into pivot_eg values ('12-mar-11');
select * from pivot_eg
pivot (count(due_dt) for due_dt in (sysdate as dt ,sysdate-1 as dt1))
is it possible i can use sysdate in for or else i shud go for case kinda pivot example? Please help me

Answer 1

Hi,
Convert the pivot column into fixed values first, like this:
WITH     got_days_ago     AS
     SELECT     TRUNC (SYSDATE) - TRUNC (due_dt)     AS days_ago
     FROM     pivot_eg
     WHERE     due_dt     >= TRUNC (SYSDATE) - 1
     AND     due_dt     <  TRUNC (SYSDATE) + 1
SELECT     *
FROM     got_days_agO
PIVOT     (   COUNT (*)
     FOR days_ago IN     ( 0     AS dt
               , 1     AS dt1
;The WHERE clause is for efficiency only. Filter out unwanted rows as early as possible.
Sorry, I'm not at an Oracle 11 database now, so I can't test it.
user2639048 wrote:
... create table pivot_eg ( due_dt date);
insert into pivot_eg values ('16-mar-11'); ...Due_dt is a DATE. Trying to insert2 VARCHAR2 values into a DATE column is asking for trouble. Sometimes we get what we ask for,
Insert DATEs into DATE columns, like this
INSERT INTO pivot_eg (due_dt) VALUES  (TO_DATE ('16-mar-2011', 'DD-mon-YYYY')); or this:
INSERT INTO pivot_eg (due_dt) VALUES  (DATE '2011-03-16');