SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 6 - see DBWR trace file
ORA-01110: data file 6:
'/export/home/oracle/product/10.2.0/db_1/dbs/CQMU01.dbf'
alter tablespace cqmu offline;
create directory zq as '/export/home/oracle/product/10.2.0/db_1/dbs';
create directory data as '+DG_ZF/zfxt/datafile';