非歸檔資料檔案誤刪除解決辦法

zhangsharp20發表於2015-07-13
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. 
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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;

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