Select username,default_tablespace,created from dba_users order by created desc;
select segment_name, bytes/1024/1024/1024 from dba_segments where owner in ('WLS816','WYJK','XCYS','PERFSTAT','TROUBLE','DLWH','OSSLOG','WEBLOGIC','TELECOM','TELECOMNEW') and SEGMENT_TYPE='TABLE' order by 2 desc;
select segment_name, bytes/1024/1024/1024 from dba_segments where owner in ('WLS816','WYJK','XCYS','PERFSTAT','TROUBLE','DLWH','OSSLOG','WEBLOGIC','TELECOM','TELECOMNEW') and SEGMENT_TYPE='TABLE' order by 2 desc;

本文提供了两个实用的 Oracle SQL 查询示例:一是按创建时间降序获取用户信息;二是按照表大小降序展示特定模式下的表空间使用情况。适用于数据库管理员和技术人员参考。
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