非归档数据文件误删除解决办法
To take a datafile offline when the database is in NOARCHIVELOG mode, use the ALTER
DATABASE statement with both the DATAFILE and OFFLINE FOR DROP clauses.
■ The OFFLINE keyword causes the database to mark the datafile OFFLINE, whether
or not it is corrupted, so that you can open the database.
■ The FOR DROP keywords mark the datafile for subsequent dropping. Such a datafile
can no longer be brought back online.
DATABASE statement with both the DATAFILE and OFFLINE FOR DROP clauses.
■ The OFFLINE keyword causes the database to mark the datafile OFFLINE, whether
or not it is corrupted, so that you can open the database.
■ The FOR DROP keywords mark the datafile for subsequent dropping. Such a datafile
can no longer be brought back online.
——————————————————————————————————————
Note: This operation does not actually drop the datafile. It
remains in the data dictionary, and you must drop it yourself using
one of the following methods:
■ An ALTER TABLESPACE ... DROP DATAFILE statement.
After an OFFLINE FOR DROP, this method works for dictionary
managed tablespaces only.
■ A DROP TABLESPACE ... INCLUDING CONTENTS AND DATAFILES
statement
■ If the preceding methods fail, an operating system command to
delete the datafile. This is the least desirable method, as it
leaves references to the datafile in the data dictionary and
control files.
——————————————————————————————————————
The following statement takes the specified datafile offline and marks it to be dropped:
ALTER DATABASE DATAFILE '/u02/oracle/rbdb1/users03.dbf' OFFLINE FOR DROP;
Note: This operation does not actually drop the datafile. It
remains in the data dictionary, and you must drop it yourself using
one of the following methods:
■ An ALTER TABLESPACE ... DROP DATAFILE statement.
After an OFFLINE FOR DROP, this method works for dictionary
managed tablespaces only.
■ A DROP TABLESPACE ... INCLUDING CONTENTS AND DATAFILES
statement
■ If the preceding methods fail, an operating system command to
delete the datafile. This is the least desirable method, as it
leaves references to the datafile in the data dictionary and
control files.
——————————————————————————————————————
The following statement takes the specified datafile offline and marks it to be dropped:
ALTER DATABASE DATAFILE '/u02/oracle/rbdb1/users03.dbf' OFFLINE FOR DROP;
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/29802484/viewspace-1731970/ ，如需转载，请注明出处，否则将追究法律责任。
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