Oracle数据库中的数据块存储 -- data block storage in an Oracle Database
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A. A block header contains a row directory pointing to all rows in the block.
B. Row data is stored starting at the end of the block.
C. An index block can contain row data
select DBMS_ROWID.ROWID_OBJECT('&&rowid') data_object_id#,
DBMS_ROWID.ROWID_RELATIVE_FNO('&&rowid') rfile#,
DBMS_ROWID.ROWID_BLOCK_NUMBER('&&rowid') block#,
DBMS_ROWID.ROWID_ROW_NUMBER('&&rowid') row#
from dual;
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