Oracle 8.1.7.0.0 on HP-UX 11.0
I am a newbie as far as PL-SQL is concerned . I have Sybase/MSSQL
T-SQL background.
We have a report which uses a select statement . This select statement
joins 15 tables . SOme of the tables are outer joined.
It runs much slow when parameters (From & To Date) are for a month.
Like From Date = Jun 1 , To Date = Jun 30. Report does not complete
even after 30 mins.
I was thinking to break this query in smaller parts. I am trying to
minimise no of tables used in single statement to around 6.
I want to use Global Temporary table , insert data in temp table by
joining few tables. Rest of the columns of Temporary tables will be
updated thru subsequent updates. Finally a select statement from
temporary table will populate the report .
Will it be a good approach (in Oracle PL-SQL) as far as performance is
concrened ? Are there any performance issues using Global temporary
table ?
Any help in this regards is highly appreciated ....
Thanks & Regards,
Mahesh Hardikar
