Oracle commonly uesd tables/views and processes（二）
2019-11-17 22:53
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一、oracle commonly table
1、dba_extents #describes the extents comprising the segments in all tablespaces in the database.
commonly column
owner
segment_name
partition_name
tablespace_name
blocks
bytes
2、dba_segments#describes the storage allocated for all segments in the database.
owner
segment_name
partition_name
segment_type *
segment_subtype # subtype of lob segment :sourcefile assm mssm and null
tablespace_name
bytes
NOTE：The next Blog describe the principles of Oracle 12C RAC .
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