dba_tables.num_rows is just the count that was recorded the last time stats were gathered (e.g. with dbms_stats.gather_schema_stats or analyze table). You can find the date & time this happened last by querying the dba_tables.last_analyzed column. "SELECT COUNT(*)" peforms a full scan of the table to determine the current number of rows.
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Received on Thu Feb 16 2006 - 15:43:15 CST
