Datafiles

1、查看数据库中数据文件结构信息

SQL> desc v$datafile;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 FILE#                                              NUMBER
 CREATION_CHANGE#                                   NUMBER
 CREATION_TIME                                      DATE
 TS#                                                NUMBER
 RFILE#                                             NUMBER
 STATUS                                             VARCHAR2(7)
 ENABLED                                            VARCHAR2(10)
 CHECKPOINT_CHANGE#                                 NUMBER
 CHECKPOINT_TIME                                    DATE
 UNRECOVERABLE_CHANGE#                              NUMBER
 UNRECOVERABLE_TIME                                 DATE
 LAST_CHANGE#                                       NUMBER
 LAST_TIME                                          DATE
 OFFLINE_CHANGE#                                    NUMBER
 ONLINE_CHANGE#                                     NUMBER
 ONLINE_TIME                                        DATE
 BYTES                                              NUMBER
 BLOCKS                                             NUMBER
 CREATE_BYTES                                       NUMBER
 BLOCK_SIZE                                         NUMBER
 NAME                                               VARCHAR2(513)
 PLUGGED_IN                                         NUMBER
 BLOCK1_OFFSET                                      NUMBER
 AUX_NAME                                           VARCHAR2(513)
 FIRST_NONLOGGED_SCN                                NUMBER
 FIRST_NONLOGGED_TIME                               DATE
 FOREIGN_DBID                                       NUMBER
 FOREIGN_CREATION_CHANGE#                           NUMBER
 FOREIGN_CREATION_TIME                              DATE
 PLUGGED_READONLY                                   VARCHAR2(3)
 PLUGIN_CHANGE#                                     NUMBER
 PLUGIN_RESETLOGS_CHANGE#                           NUMBER
 PLUGIN_RESETLOGS_TIME                              DATE

 2、查看数据库中数据文件信息

SQL> select file#,name from v$datafile;

     FILE# NAME
---------- ----------------------------------------
         1 /u01/oradata/poli/system01.dbf
         2 /u01/oradata/poli/sysaux01.dbf
         3 /u01/oradata/poli/undotbs01.dbf
         4 /u01/oradata/poli/users01.dbf
         5 /u01/oradata/poli/example01.dbf
         6 /u01/oradata/expimp01.dbf

6 rows selected.

 3、查询数据文件与表空间信息对应关系

SQL> select file#,ts#,name from v$datafile;

     FILE#        TS# NAME
---------- ---------- --------------------------------------------------
         1          0 /u01/oradata/md/system01.dbf
         2          1 /u01/oradata/md/sysaux01.dbf
         3          2 /u01/oradata/md/undotbs01.dbf
         4          4 /u01/oradata/md/users01.dbf
         5          6 /u01/oradata/md/example01.dbf
         6          8 /u01/oradata/md/app1_01.dbf

6 rows selected.

4、查看数据库中数据文件、控制文件、日志文件信息

SQL> select name from v$datafile
  2  union
  3  select name from v$controlfile
  4  union
  5  select member from v$logfile;

NAME
--------------------------------------------------------------------------------
+DATA/phydb/controlfile/cont.ctl
+DATA/phydb/datafile/example.257.819931453
+DATA/phydb/datafile/sysaux.259.819931453
+DATA/phydb/datafile/system.261.819931453
+DATA/phydb/datafile/undotbs1.258.819931453
+DATA/phydb/datafile/undotbs2.260.819931453
+DATA/phydb/datafile/users.262.819931457
+DATA/phydb/onlinelog/group_1.261.819703681
+DATA/phydb/onlinelog/group_2.262.819703685
+DATA/phydb/onlinelog/group_3.266.819704181
+DATA/phydb/onlinelog/group_4.267.819704185

NAME
--------------------------------------------------------------------------------
+FLASH/devdb/onlinelog/group_1.257.819703683
+FLASH/devdb/onlinelog/group_2.258.819703687
+FLASH/devdb/onlinelog/group_3.259.819704183
+FLASH/devdb/onlinelog/group_4.260.819704189

15 rows selected.