DATE fields and LOG files in context with external tables

I am facing two problems when dealing with the external tables feature in Oracle 9i.
I created an External Table with some fileds with the DATE data type . There were no issues during the creation part. But when i query the table, the DATE fields are not properly selected though the data is there in the files. Is there any ideas to deal with this ?
My next question is regarding the log files. The contents in the log file seems to be growing when querying the external tables. Is there a way to control this behaviour?
Suggestions / Advices on the above two issues are welcome.
Thanks
Lakshminarayanan

Hi
If you have date datatypes than:
select
greatest(TABCASER1.CASERRECIEVEDDATE, EVCASERS.FINALEVDATES, EVCASERS.PUBLICATIONDATE, EVCASERS.PUBLICATIONDATE, TABCASER.COMPAREACCEPDATE)
from TABCASER, TABCASER1, EVCASERS
where ...-- join and other conditions
1. greatest is good enough
2. to_date creates date dataype from string with the format of format string ('mm/dd/yyyy')
3. decode(a, b, c, d) is a function: if a = b than return c else d. NULL means that there is no data in the cell of the table.
6. to format the date for display use to_char function with format modell as in the to_date function.
Ott Karesz
http://www.trendo-kft.hu

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