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Types of Metadata Views in Oracle 10g

Metadata indicates data about the database. As a DBA we need frequently access the metadata in oracle database. There are two types of metadata views.

1)Data dictionary views.
2)Dynamic performance views.

Comparison between these Two:

A)Data dictionary views have names that begin with DBA_,ALL_, and USER_.Dynamic performance views have names that begin with V$.

B)The DBA_ views are available only when the database is open and running.Some V$ views are available even when the database is not fully open and running.

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