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SELECT s.segment_name, decode(SUM(BYTES), NULL, 0, SUM(BYTES) / 1024) FROM DBA_SEGMENTS S, dba_tables t WHERE s.owner = 'you segment owner' AND t.owner = 'your table owner' AND s.segment_name = t.table_name AND s.blocks IS NOT NULL AND s.blocks > 0 GROUP BY s.segment_name HAVING SUM(BYTES) > 0 其中有些表的大小为表初始大小,尽管数据行为0,也能包含在其中,因为之前的行被删除,高水位线没下来。
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