New to PL\SQL from Sybase and need an answer to a question please

Hi,
I want to read a row on table 'One' and caputure the values of 6 columns. So I will have values "A", "B","C", "D", "E" & "F". Then I want to use these 6 key values in a sub query to select rows from Table 'Two'. From table 'Two' I want want to splilt a varchar column that has multiple values that are delimited by '|'.
In Sybase I would of stuck the 6 values into variables from Table 'One'. Then inserted them into a temp table and used that temp table in the join to get the rows from table 'Two' that I wanted. Then stuck those results in a temp table and lopped around the rows and split the data out into another temp table. Then just selected the temp table to uotput the results. Now that may seem long winded but very simple to build.
So can someone give me some help in how to structure this in Oracle. Also I cannot created global temp tables in my session.
Thanks in Advance

912982 wrote:
In Sybase I would of stuck the 6 values into variables from Table 'One'. Then inserted them into a temp table and used that temp table in the join to get the rows from table 'Two' that I wanted. Then stuck those results in a temp table and lopped around the rows and split the data out into another temp table. Then just selected the temp table to uotput the results. Now that may seem long winded but very simple to build.The reason for that in Sybase/SQL-Server is to minimise locking. So grab data as quickly as possible (minimise the time needed for the read or write lock) and stuff it into a temp table that is session local and cannot cause lock contention with other sessions.
A monolithic lock manager is used. This means means that every single lock requires memory to manager. That is why lock escalation exists. Memory starts getting low and a bunch of row locks are changed into fewer page locks, thus freeing memory. Or a bunch of page locks are changed into a table lock, thus freeing memory.
Locks are expensive.
In Oracle that is not the case. A single lock cost as much as a billion locks. Nothing. Not a single byte of memory is required as there is no monolithic lock manager in memory (Oracle has transaction slots in data blocks). In Oracle, a reader (with read locks) does not block another reader or another writer. Even to the same rows. A writer does not block a reader - even to the same rows (and the reader does a consistent and not dirty read). The only times there is a block is when writers attempt to lock the same rows.
Thus in Oracle, there is no need for the long winded temp table work-around of Sybase. It is not only unnecessary, but you will seriously impact Oracle performance and scalability by doing that.
Oracle is not Sybase. So be careful of using your Sybase technical expertise and approaches to Oracle. It will be wrong most of the time.

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