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Multitenant dictionary: what is consolidated and what is not

The documentation says that for Reduction of duplication and Ease of database upgrade the Oracle-supplied objects such as data dictionary table definitions and PL/SQL packages are represented only in the root.

Unfortunately, this is only partly true. System PL/SQL packages are only in root but system table definition are replicated into all PDBs.

This post is an extension of a previous blog post which was on 12cR1. This one is on 12cR2.

Oracle 12c: XQuery Update

New, new…? No, not really new, XQuery Update (W3C standard/draft 2011) was already implemented in 11.2.0.3.0, but is now officially also announced. Besides the XQuery Full Text support (XQFT for short, W3C standard/draft 2011), this is one of the big new features in Oracle 12c. With this update XQuery functionality, the XQuery standard is further

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