<Li> ALTER TABLE modify partition by...online (to change the partitioning schema of a table) </Li> <P> Database administrators control many of the tunable variations in an Oracle instance by means of values in a parameter file . This file in its ASCII default form ("pfile") normally has a name of the format init <SID - name>. ora . The default binary equivalent server parameter file ("spfile") (dynamically reconfigurable to some extent) defaults to the format spfile <SID - name>. ora . Within an SQL - based environment, the views V $PARAMETER and V $SPPARAMETER give access to reading parameter values . </P> <P> The Oracle DBMS kernel code depends on C programming . Database administrators have limited access to Oracle - internal C structures via V $views and their underlying X $"tables". </P> <P> Layers or modules in the kernel (depending on different releases) may include the following (given with their inferred meaning): </P>

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