Solve oracle-ora-01122 01110 01210

The database server was moved at noon , Light up and start the database .

lsnrctl start
The listener supports no services
The command completed successfully

That's all right. .
Then start the database , Report errors ：

SQL> startup
ORACLE instance started.

Total System Global Area 2137886720 bytes
Fixed Size                  2254952 bytes
Variable Size             838862744 bytes
Database Buffers         1291845632 bytes
Redo Buffers                4923392 bytes
Database mounted.
ORA-01122: database file 11 failed verification check
ORA-01110: data file 11: '/data/oracle/oradata/orcl/xn_01.ora'
ORA-01210: data file header is media corrupt

Look at the error message, there is a ora The file header of the file is corrupt . First try recover operation ：

SQL> recover datafile 11
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 11: '/data/oracle/oradata/orcl/xn_01.ora'
ORA-01122: database file 11 failed verification check
ORA-01110: data file 11: '/data/oracle/oradata/orcl/xn_01.ora'
ORA-01210: data file header is media corrupt

The head is big in a moment . Baidu data found that the repair process is very cumbersome . So I decided to deal with it in a simple and rough way , Since the tablespace file is broken , Then rebuild the tablespace file .
Be careful ： The premise of this approach is that the data in your table space can be discarded , My side is just a test library , And it's urgent to start the database , So it can be rebuilt . If your tablespace file has important data, be careful .
First, find another database service that can be used , Yes dba Users with permissions log in
Create a new tablespace ：

create tablespace xn_01
datafile '/data/oracle/oradata/orcl/xn_01.ora'
size 50m
autoextend on
next 5m maxsize 10000m
extent management local;

Once created , Query the location of the data file

select d.FILE_NAME from dba_data_files d where d.FILE_NAME like '%xn_01%'
2	/data/oracle/oradata/orcl/xn_01.ora

Then go to /data/oracle/oradata/orcl Copy out of the directory xn_01.ora file , Copy to the database in question datafile Directory , If your tablespace file can be discarded , Just overwrite the one with the same name xn_01.ora. If there's important data , Then back up the original problematic tablespace , Then execute the copy , Wait for the database to start , Try to solve the problem of table space corruption
Then try to open the database again ：

SQL> shutdown immediate;
ORA-01109: database not open


Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area 2137886720 bytes
Fixed Size                  2254952 bytes
Variable Size             838862744 bytes
Database Buffers         1291845632 bytes
Redo Buffers                4923392 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 11 - see DBWR trace file
ORA-01110: data file 11: '/data/oracle/oradata/orcl/xn_01.ora'

At present, the prompt message is that the file cannot be locked , That is, the file data of the table space is ok , however ORACLE Unable to recognize this table space , Since I can't recognize it , Just go offline ：

SQL> alter database datafile 11 offline drop;

Database altered.

SQL> alter database open;

Database altered.

Get it done .