what is the difference b/w oracle8i and oracle9i

Answer Posted / bindu

Oracle 9i is an upgrade version of Oracle.It offers lot of
new and additional features, which are not available in
oracle 8i.It offers, new features to both
developers and administrators.Oracle 9i is the obvious
choice.
Like: 8i introduced a number of features in SQL that could
not be used in PL/SQL. Since we went to 9.2 it's been great
to be able to use MERGE INTO, CASE and analytic functions
within PL/SQL packages.

A lot of little things are improved in PL/SQL, such as CAST
now being implicit in many situations when you used to have
to code FROM TABLE(CAST(table_expression AS
some_array_type) - you can now use FROM TABLE
(table_expression). Also INDEX BY collections (associative
arrays) can now INDEX BY other types besides BINARY_INTEGER
(e.g. PLS_INTEGER, VARCHAR2).

In 9i you can use locally managed tablespaces for every
tablespace including temp, rollback and system, while in 8i
you were limited to regular data/index tablespaces. You
also get automated undo management which is worth taking a
look at (for example you can configure it to hold onto
rollback blocks for longer, which could potentially help
reduce ORA-01555 Snapshot Too Old errors).

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