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2025-09-25 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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1. 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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