How to check the data file address of Oracle database query

Oracle data file address query method: through V$DATAFILE view: query statement: SELECT FILE_ID, NAME, TABLESPACE_NAME, FILE_SIZE FROM V$DATAFILE; through DBA_DATA_FILES view: the syntax is the same as V$DATAFILE, and requires DBA authority to access; Through DBMS_FGA API: DECLARE dm DBMS_FGA.DATAMAP; OPEN data mapping handle, GET data file information, CLOSE data mapping handle.

How to query the Oracle database data file address

The address of the data file in the Oracle database can be queried by the following method:

Through V$DATAFILE view:

This view contains information about all data files, including full path names. To query the data file address, you can use the following SQL statement:

<code class="sql">SELECT FILE_ID, NAME, TABLESPACE_NAME, FILE_SIZE
FROM V$DATAFILE;</code>

Through the DBA_DATA_FILES view:

The DBA_DATA_FILES view provides similar information to V$DATAFILE, but requires Only DBA authority can be accessed. The syntax is the same as V$DATAFILE.

Through the DBMS_FGA API:

The DBMS_FGA API provides a series of functions that can be used to query file system information, including data file addresses. To use this method, you need to perform the following steps:

1. DECLARE A variable of type DBMS_FGA.DATAMAP.
2. OPEN Data mapping handle.
3. GET Data file information.
4. CLOSE Data mapping handle.

The following is an example of DBMS_FGA API usage:

<code class="sql">DECLARE
  dm DBMS_FGA.DATAMAP;
BEGIN
  DBMS_FGA.OPEN_DATAMAP(dm, 'file');
  DBMS_FGA.GET_DATAMAP_ENTRY(dm, 1, 'LOCATION', file_location);
  DBMS_FGA.CLOSE_DATAMAP(dm);

  DBMS_OUTPUT.PUT_LINE('Data file location: ' || file_location);
END;</code>

The above is the detailed content of How to check the data file address of Oracle database query. For more information, please follow other related articles on the PHP Chinese website!