Error selecting XML

Question

Hello!
I have one table which I use for storing temperature data.
CREATE TABLE TEMPERATURE
KRAJ VARCHAR2(100 BYTE),
TEMP NUMBER,
URA_MERITVE VARCHAR2(50 BYTE),
DATUM DATE DEFAULT SYSDATE
(Kraj means Town, Temp is temperature, Ura_meritve is HourOfMeasurement, datum means date)
I try to extract XML out of it using following select
SELECT
XMLElement("PodatkiZaKraj",
XMLAttributes(kraj AS Kraj, dan as TrenDan),
(SELECT XMLAGG(XMLElement("PodatkiZaUro",XMLAttributes(ura_meritve AS Ura, temp as Temperatura)))
FROM temperature e
WHERE e.kraj = d.kraj and trunc(d.dan,'dd')=trunc(e.datum,'dd')
group by d.dan
)).getStringVal()
FROM
select kraj, trunc(datum,'dd') dan, min(temp) MinTemp, max(temp) MaxTemp, avg(temp) AvgTemp from temperature
WHERE kraj = 'Bovec' and Trunc(DATUM,'dd') = Trunc(SYSDATE,'dd')
Group by kraj, trunc(datum,'dd')
) d;
which in SQL+ returns an error:
     select kraj, trunc(datum,'dd') dan, min(temp) MinTemp, max(temp) MaxTemp, avg(temp) AvgTemp from tem
     ERROR at line 11:
     ORA-00979: not a GROUP BY expression
If I run subquery separately I get no error:
select kraj, trunc(datum,'dd') dan, min(temp) MinTemp, max(temp) MaxTemp, avg(temp) AvgTemp from temperature
WHERE kraj = 'Bovec' and Trunc(DATUM,'dd') = Trunc(SYSDATE,'dd')
Group by kraj, trunc(datum,'dd')
Somebody has an idea why?
Mind that similar select statement generates no error:
Select kraj,
dan,
(SELECT datum
FROM temperature e
WHERE e.kraj = d.kraj and trunc(d.dan,'dd')=trunc(e.datum,'dd') and rownum=1)
FROM
select kraj, trunc(datum,'dd') dan, min(temp) MinTemp, max(temp) MaxTemp, avg(temp) AvgTemp from temperature
WHERE kraj = 'Bovec' and Trunc(DATUM,'dd') = Trunc(SYSDATE,'dd')
Group by kraj, trunc(datum,'dd')
) d;
I'm using:
SQL*Plus: Release 9.2.0.1.0 - Production on To Avg 12 15:42:38 2003
Oracle9i Enterprise Edition Release 9.2.0.3.0 - Production
JServer Release 9.2.0.3.0 - Production
Regards,
Miki

Answer 1

Ah, jeah, it's a bug....!