Using Connect prior option in sql

Question

HI,
when i tried the below query it is resulting the rows as below
select level,ssn,report_to, baid
from table1
where ssn not in (select e.ssn
from table1 e, .
table2 s
where e.ssn = s.ssn)
start with ssn in (select e.ssn
from table1 e)
connect by prior report_to=baid;
Result
LEVEL SSN REPORT_TO BAID
1 UNKSSN BFTXQ6Q 0
2 1444595 BAT35YW BFTXQ6Q
3 1480160 BL2Y2K1 BAT35YW
4 1200802 BAKA5T5 BL2Y2K1
5 1261895 BA1M3S8 BAKA5T5
6 1271806 BAJB7GV BA1M3S8
7 1235427 BDZ8H4V BAJB7GV
8 1355090 B0YTGX6 BDZ8H4V
1 UNKSSN B0JXMSY 0
2 1236336 BBW6RSX B0JXMSY
3 1228220 B0SM3YK BBW6RSX
4 1367022 BM5AYVG B0SM3YK
when i tried the same one using max(level) like below
select ssn,level,max(level) maxval
from table1
where ssn not in ( select e.ssn
from table1 e, table2 s
where e.ssn = s.ssn)
group by ssn,level
start with ssn in (select e.ssn
from table1 e)
connect by prior report_to=baid;
result is :
ORA-30928-cONNECT BY FILTERING PHASE RUNS OUT OF TEMP TABLESPACE
Please advice, can any one give me the logic to get the max(level) value.
Thanks

Answer 1

Hi,
The documentation implies that the START WITH and CONNECT BY clauses should come before the GROUP BY clause. I've never known it to make a difference before, but you might try putting the GROUP BY clause last.
If you're GROUPing by LEVEL, what's the point of SELECTing MAX (LEVEL)? MAX (LEVEL) will always be the same as LEVEL.
What are you trying to do?
Post some sample data (CREATE TABLE and INSERT statements) and the results you want from that data, and somebody will help you get them.