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SQL> desc dba_data_files;
Name Null? Type
----------------------------------------- -------- ----------------------------
FILE_NAME VARCHAR2(513)
FILE_ID NUMBER
TABLESPACE_NAME VARCHAR2(30)
BYTES NUMBER
BLOCKS NUMBER
STATUS VARCHAR2(9)
RELATIVE_FNO NUMBER
AUTOEXTENSIBLE VARCHAR2(3)
MAXBYTES NUMBER
MAXBLOCKS NUMBER
INCREMENT_BY NUMBER
USER_BYTES NUMBER
USER_BLOCKS NUMBER
SQL> select file_name,autoextensible from dba_data_files;
FILE_NAME
----------------------------------------------------------------------
----------
AUT
---
/DMBDB/DW_DAT11/oradata/system01.dbf
NO
/DMBDB/DW_DAT11/oradata/undotbs01.dbf
NO
/DMBDB/DW_DAT12/oradata/dw_dat01_1.DBF
YES
alter database datafile '/DMBDB/DW_DAT11/oradata/undotbs01.dbf' autoextend on;
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