今天搞EXADATA，正好有时间，测试下只能在EXADATA下才能用的11g新特性-混合列压缩。 SQL> select segment_name,bytes/1024/1024/1024 from dba_segments where owner='XXX' and segment_name='XXXX'; SEGMENT_NAME BYTES/1024/1024/1024 ------------------------------ -------------------- ...