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select user_name,sql_text from v$open_cursor where sid in (select sid from (select sid,serial#,username,program from v$session where status='ACTIVE'));
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alter tablespace ±í¿Õ¼äÃû add datafile '/u1/oradata/userdata_002.ora' size 50m;
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alter database datafile '/u1/oradata/userdata_001.ora' resize 50M;
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¡¡¡¡select * from tab;
¡¡¡¡select table_name from user_tables;
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¡¡¡¡select text from user_views where view_name=upper('&view_name');
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¡¡¡¡select trigger_name,trigger_type,table_owner,table_name,status from user_triggers;
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¡¡¡¡select * from user_db_links;
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¡¡¡¡select TABLE_NAME,CONSTRAINT_NAME,SEARCH_CONDITION,STATUS from user_constraints;
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¡¡¡¡select table_name from dict order by table_name;
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