1.删除undo表空间rm -f undotbs01.dbf
2.报错SQL> create table t3 as select * from dba_objects where rownum < 3;
create table t3 as select * from dba_objects where rownum < 3
*
ERROR at line 1:
ORA-01116: error in opening database file 2
ORA-01110: data file 2: "/u01/app/Oracle/oradata/demo/undotbs01.dbf"
ORA-27041: unable to open file
Linux Error: 2: No such file or directory
Additional information: 3
3.恢复数据文件alter database datafile 2 online 4.alter system checkpoint select status from v$datafile;MongoDB 介绍及安装冷备份----删除系统表空间相关资讯 Oracle数据库 Oracle入门教程 oracle数据库教程
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