Can system table space cause multiple data files in several places?

Similar Questions

• tablespace with multiple data files

  Hi all
  
  We have RHEL4 server with oracle 10 g 2 inside.
  
  can we create a tablespace with multiple data files? I mean while creating a tablespace itself, we should be able to create two or more data files (should not use ALTER tablespace command).
  
  If possible, please give me the SQL to do this (assume that I need to create a tablespace with two data files).
  
  Thanks in advance...

  Not so difficult isn't it?

  create tablespace datafile test
  '1.dbf' size 1 m REUSE AUTOEXTEND ON NEXT 32 M MAXSIZE 1500 M,
  '2.dbf' size 1 M REUSE AUTOEXTEND ON NEXT 32 M MAXSIZE 1500 M
  EXTENT MANAGEMENT SEGMENT LOCAL SPACE MANAGEMENT AUTO;

• I'm unable to reclaim space after deleting data files.

  Dear all.
  
  I'm unable to reclaim space after deleting data files.
  
  Scenario:
  
  One of my mount point has reached full growth of undotablespace (undotbs2), so I spent again (undotbs3) and deleted the old.
  Problem 1.
  Failed to retrieve space after removing the undotbs2.
  Problem 2.
  Dial-up Mount also become fully...:)
  
  The steps that I followed for the switching of the cancellation:
  
  BANNER
  ----------------------------------------------------------------
  Oracle Database 10 g Enterprise Edition release 10.2.0.3.0 - 64bi
  PL/SQL version 10.2.0.3.0 - Production
  CORE Production 10.2.0.3.0
  AMT for IBM/AIX RISC System/6000: Version 10.2.0.3.0 - production
  NLSRTL Version 10.2.0.3.0 - Production
  
  
  SQL > show Cancel parameter
  VALUE OF TYPE NAME
  ------------------------------------ ----------- ------------------------------
  UNDO_MANAGEMENT string AUTO
  UNDO_RETENTION integer 32400
  undo_tablespace string UNDOTBS2
  
  
  SQL > select BYTES/1024/1024, FILE_NAME in dba_data_files where nom_tablespace = 'UNDOTBS2 ';
  BYTES/1024/1024
  ---------------
  FILE_NAME
  ------------------------------------------------------------------------------------------------------------------------------------------------------
  45688.125
  /U04/oradata/RADPRDMH/undotbs02b.dbf
  6268
  /U04/oradata/RADPRDMH/undotbs02a.dbf
  
  
  
  CREATE UNDO TABLESPACE undotbs3
  DATAFILE ' / u05/oradata/RADPRDMH/undotbs03a.dbf'
  SIZE 5000M AUTOEXTEND ON;
  
  
  ALTER SYSTEM SET UNDO_TABLESPACE = undotbs3 SCOPE = BOTH;
  
  
  DROP TABLESPACE UNDOTBS2 INCLUDING CONTENT AND DATA FILES;

  Only solution is umount the point of editing or the db bounce. It is because of 'SEMAPHORE '.

  Semaphores are sharable resources who take a non-negative integer value. They are manipulted by the P (waiting) and V (signal) functions that decrement and increment the semaphore, respectively. When a process needs a resource, a "waiting" is issued and the semaphore is decremented. When the semaphore contains a value of zero, the resources are not available and the calling process turns or blocks (if applicable) until resources are available. When a process opens a resource controlled by a semaphore, it increments the semaphore and the waiting process are advised.

• How to place data files in two places during duplication of database or refresh via RMAN test

  Hi all

  can you please find the solution and help me on this point

  How to place data files in two places during duplication of database or refresh via RMAN test

  Thank you

  Ran

  Hi all

  Please send me as soon as possible if you have a solution.

  Thank you.

  Ran

• sqlloader to load two tables of the single data file in a single operation

  Oracle 11.2.0.3 SE - One

  Oracle Linux 5.6

  I don't know if I need a second set of eyes or if I am missing something.

  Problem: Given a file of text csv with header and detail records (identified by the first field in the file) use sql loader to load the header and detail of the tables in a single operation.

  The header record is to take, but the detail records are rejected by omitting the WHEN clause.

  More comments after reading through the exhibits:

  In view of these two tables:

  SQL > desc EDSTEST_HEADER

  Name                                      Null?    Type

  ----------------------------------------- -------- ----------------------------

  EDSTEST_HEADER_ID NOT NULL NUMBER

  REC_TYPE VARCHAR2 (10)

  SOLD_TO_ACCOUNT VARCHAR2 (50)

  SCAC_RECEIVER_ID VARCHAR2 (50)

  FORMAT_TYPE VARCHAR2 (10)

  CLIENT_NAME VARCHAR2 (100)

  CUSTOMER_PICKUP_ADDRESS VARCHAR2 (100)

  CUSTOMER_PICKUP_CITY VARCHAR2 (50)

  CUSTOMER_PICKUP_STATE VARCHAR2 (10)

  CUSTOMER_PICKUP_ZIP VARCHAR2 (50)

  INSERT_USER VARCHAR2 (50)

  DATE OF INSERT_USER_DATE

  INSERT_STATUS_CODE VARCHAR2 (10)

  SQL > desc EDSTEST_DETAIL

  Name Null?    Type

  ----------------------------------------- -------- ----------------------------

  EDSTEST_DETAIL_ID NOT NULL NUMBER

  NUMBER OF EDSTEST_HEADER_ID

  REC_TYPE VARCHAR2 (10)

  SHIP_TO_NAME VARCHAR2 (100)

  SHIP_TO_ADDRESS VARCHAR2 (100)

  SHIP_TO_CITY VARCHAR2 (50)

  SHIP_TO_STATE VARCHAR2 (10)

  SHIP_TO_ZIP VARCHAR2 (50)

  STATUS_OR_APPT_REASON_CD VARCHAR2 (10)

  EVENT_DESCRIPTION VARCHAR2 (50)

  SHIPMENT_STATUS_CD VARCHAR2 (10)

  SHIPMENT_EVENT_DATE VARCHAR2 (10)

  SHIPMENT_EVENT_TIME VARCHAR2 (10)

  EVENT_TIME_ZONE VARCHAR2 (30)

  EVENT_CITY VARCHAR2 (100)

  EVENT_STATE VARCHAR2 (50)

  EVENT_ZIP VARCHAR2 (50)

  CUSTOMER_CONFIRM VARCHAR2 (100)

  DELIVERY_CONFIRM VARCHAR2 (100)

  TRACKING_NUMBER VARCHAR2 (50)

  MAIL_REC_WEIGHT VARCHAR2 (20)

  MAIL_REC_WEIGHT_CD VARCHAR2 (10)

  MAIL_RED_QTY VARCHAR2 (10)

  INSERT_USER VARCHAR2 (50)

  DATE OF INSERT_USER_DATE

  INSERT_STATUS_CODE VARCHAR2 (10)

  In light of this data file:

  Oracle: mydb$ cat eds_edstest.dat

  HDR, 0005114090, MYORG, CSV, MY NAME OF THE COMPANY, 123 ELM ST, STUCKYVILLE, OH, 12345

  DTL, TOADSUCK, NC, 27999, NS, ARRIVED at the UNIT, X 4, 20140726, 063100, AND, TOADSUCK, NC,.3861, 27999, 12345, 23456 lbs, 1

  DTL, TOADSUCK, NC, 27999, lbs, 1 NS, SORTING COMPLETE, X 6, 20140726, 080000, AND TOADSUCK, NC,.3861, 27999, 12345, 23456

  DTL, TOADSUCK, NC, 27999, NS, PRONOUNCED, D1, 20140726, 121800, TOADSUCK, NC, 27999, 12345, 23456,.3861, lbs and 1

  Given this control sqlloader file:

  Oracle: mydb$ cat eds_edstest_combined.ctl

  Load

  INFILE ' / xfers/oracle/myapp/data/eds_edstest.dat'

  BADFILE ' / xfers/oracle/myapp/data/eds_edstest.bad'

  DISCARDFILE ' / xfers/oracle/myapp/data/eds_edstest.dsc'

  ADD

  IN THE TABLE estevens.edstest_header

  WHERE (rec_type = 'HDR')

  FIELDS TERMINATED BY ', '.

  SURROUNDED OF POSSIBLY "" "

  TRAILING NULLCOLS

  (rec_type CHAR,

  sold_to_account TANK,

  scac_receiver_id TANK,

  format_type TANK,

  client_name TANK,

  customer_pickup_address TANK,

  customer_pickup_city TANK,

  customer_pickup_state TANK,

  customer_pickup_zip TANK,

  INSERT_USER "1"

  INSERT_USER_DATE sysdate,

  INSERT_STATUS_CODE CONSTANT 'I')

  IN THE TABLE estevens.edstest_detail

  WHERE (rec_type = 'PIF')

  FIELDS TERMINATED BY ', '.

  SURROUNDED OF POSSIBLY "" "

  TRAILING NULLCOLS

  (rec_type CHAR,

  ship_to_name TANK,

  ship_to_address TANK,

  ship_to_city TANK,

  ship_to_state TANK,

  ship_to_zip TANK,

  status_or_appt_reason_cd TANK,

  event_description TANK,

  shipment_status_cd TANK,

  shipment_event_date TANK,

  shipment_event_time TANK,

  event_time_zone TANK,

  event_city TANK,

  Event_State TANK,

  event_zip TANK,

  customer_confirm TANK,

  delivery_confirm TANK,

  tracking_number TANK,

  mail_rec_weight TANK,

  mail_rec_weight_cd TANK,

  mail_red_qty TANK,

  INSERT_USER "1"

  INSERT_USER_DATE sysdate,

  INSERT_STATUS_CODE CONSTANT 'I')

  -END CONTROL FILE

  And the time of execution of transactions:

  SQL * Loader: release 11.2.0.3.0 - Production the kill Jul 29 07:50:04 2014

  Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

  Control file: /xfers/oracle/myapp/control/eds_edstest_combined.ctl

  Data file: /xfers/oracle/myapp/data/eds_edstest.dat

  Bad leadership: /xfers/oracle/myapp/data/eds_edstest.bad

  Delete the file: /xfers/oracle/myapp/data/eds_edstest.dsc

  (Allow all releases)

  Number of loading: ALL

  Number of jump: 0

  Authorized errors: 50

  Link table: 10000 lines, maximum of 256000 bytes

  Continuation of the debate: none is specified

  Path used: classics

  Silent options: your COMMENTS

  Table ESTEVENS. EDSTEST_HEADER, loaded when REC_TYPE = 0 X 484452 (character "HDR") add the option in effect for this table: APPEND TRAILING NULLCOLS option in effect

  Column Position Len term Encl. Datatype name

  ------------------------------ ---------- ----- ---- ---- ---------------------

  FIRST REC_TYPE *, O ("") CHARACTER

  SOLD_TO_ACCOUNT NEXT *, O ("") CHARACTER

  SCAC_RECEIVER_ID NEXT *, O ("") CHARACTER

  FORMAT_TYPE NEXT *, O ("") CHARACTER

  CLIENT_NAME NEXT *, O ("") CHARACTER

  CUSTOMER_PICKUP_ADDRESS NEXT *, O ("") CHARACTER

  CUSTOMER_PICKUP_CITY NEXT *, O ("") CHARACTER

  CUSTOMER_PICKUP_STATE NEXT *, O ("") CHARACTER

  CUSTOMER_PICKUP_ZIP NEXT *, O ("") CHARACTER

  INSERT_USER NEXT *, O ("") CHARACTER

  The SQL string for the column: "1."

  INSERT_USER_DATE SYSDATE

  CONSTANT INSERT_STATUS_CODE

  The value is 'I '.

  Table ESTEVENS. EDSTEST_DETAIL, loaded when REC_TYPE = 0X44544c ('PIF' character) in effect for this table insert option: APPEND TRAILING NULLCOLS option in effect

  Column Position Len term Encl. Datatype name

  ------------------------------ ---------- ----- ---- ---- ---------------------

  REC_TYPE NEXT *, O ("") CHARACTER

  SHIP_TO_NAME NEXT *, O ("") CHARACTER

  SHIP_TO_ADDRESS NEXT *, O ("") CHARACTER

  SHIP_TO_CITY NEXT *, O ("") CHARACTER

  SHIP_TO_STATE NEXT *, O ("") CHARACTER

  SHIP_TO_ZIP NEXT *, O ("") CHARACTER

  STATUS_OR_APPT_REASON_CD NEXT *, O ("") CHARACTER

  EVENT_DESCRIPTION NEXT *, O ("") CHARACTER

  SHIPMENT_STATUS_CD NEXT *, O ("") CHARACTER

  SHIPMENT_EVENT_DATE NEXT *, O ("") CHARACTER

  SHIPMENT_EVENT_TIME NEXT *, O ("") CHARACTER

  EVENT_TIME_ZONE NEXT *, O ("") CHARACTER

  EVENT_CITY NEXT *, O ("") CHARACTER

  EVENT_STATE NEXT *, O ("") CHARACTER

  EVENT_ZIP NEXT *, O ("") CHARACTER

  CUSTOMER_CONFIRM NEXT *, O ("") CHARACTER

  DELIVERY_CONFIRM NEXT *, O ("") CHARACTER

  TRACKING_NUMBER NEXT *, O ("") CHARACTER

  MAIL_REC_WEIGHT NEXT *, O ("") CHARACTER

  MAIL_REC_WEIGHT_CD NEXT *, O ("") CHARACTER

  MAIL_RED_QTY NEXT *, O ("") CHARACTER

  INSERT_USER NEXT *, O ("") CHARACTER

  The SQL string for the column: "1."

  INSERT_USER_DATE SYSDATE

  CONSTANT INSERT_STATUS_CODE

  The value is 'I '.

  value used for the parameter LINES increased from 10000 to 30 sheet 2: discarded - failed all WHEN clauses.

  Sheet 3: Discarded - failed all WHEN clauses.

  Folder 4: Discarded - failed all WHEN clauses.

  Table ESTEVENS. EDSTEST_HEADER:

  1 row loaded successfully.

  0 rows not loaded due to data errors.

  3 rows not loading because all WHEN clauses were failed.

  0 rows not populated because all fields are null.

  Table ESTEVENS. EDSTEST_DETAIL:

  0 rows successfully loaded.

  0 rows not loaded due to data errors.

  4 rows not loading because all WHEN clauses were failed.

  0 rows not populated because all fields are null.

  The space allocated to bind table: 247800 byte (30 lines)

  Bytes of read buffer: 1048576

  Total logical records ignored: 0

  Total logical records read: 4

  Total rejected logical records: 0

  Logical records discarded total: 3

  Run started the kill Jul 29 07:50:04 2014

  Run finished on Tue Jul 29 07:50:04 2014

  Time was: 00:00:00.07

  Time processor was: 00:00:00.01

  It works on linux, and the file data calculated from a Windows system to the time we get to it, but it's in the * nix format - with a simple x '0A' as the line terminator.

  If, in the control file, I comment on the block of INSERTION for the header table, retail inserts very well.

  If, in the control file, (return to the initial charge, two tables) I change the line

  INFILE ' / xfers/oracle/myapp/data/eds_edstest.dat'

  To read

  INFILE ' / xfers/oracle/myapp/data/eds_edstest.dat' "str" | "» \n' »

  The saved result becomes

  Table ESTEVENS. EDSTEST_HEADER:

  1 row loaded successfully.

  0 rows not loaded due to data errors.

  0 rows not loading because all WHEN clauses were failed.

  0 rows not populated because all fields are null.

  Table ESTEVENS. EDSTEST_DETAIL:

  0 rows successfully loaded.

  0 rows not loaded due to data errors.

  1 row not loaded because all WHEN clauses were failed.

  0 rows not populated because all fields are null.

  I try to help the developer on this, and it resists change to use external tables. Even if I can overcome that, I now have a puzzle I want to solve, just to add to my knowledge.  Plus, I have some concerns at this stage that whatever it is that miss me here could also come into play if I convert external tables.

  Ed,

  Are you sure that put you the post in the right place?  It should be located in the first definition of the following field each time after the first when clause clause.  Put after the first when the clause is optional.  When I use the following with what you have provided, it loads 1 record in the table header and 3 records in the Details table.  Did you actually do or tell your developer to do and wish that he understood and put it in the right place?

  Load

  INFILE 'eds_edstest.dat '.

  BADFILE "eds_edstest.bad."

  DISCARDFILE 'eds_edstest.dsc '.

  ADD

  IN THE TABLE edstest_header

  WHERE (rec_type = 'HDR')

  FIELDS TERMINATED BY ', '.

  SURROUNDED OF POSSIBLY "" "

  TRAILING NULLCOLS

  (rec_type CHAR,

  sold_to_account TANK,

  scac_receiver_id TANK,

  format_type TANK,

  client_name TANK,

  customer_pickup_address TANK,

  customer_pickup_city TANK,

  customer_pickup_state TANK,

  customer_pickup_zip TANK,

  INSERT_USER "1"

  INSERT_USER_DATE sysdate,

  INSERT_STATUS_CODE CONSTANT 'I')

  IN THE TABLE edstest_detail

  WHERE (rec_type = 'PIF')

  FIELDS TERMINATED BY ', '.

  SURROUNDED OF POSSIBLY "" "

  TRAILING NULLCOLS

  (rec_type POSITION (1) TANK,

  ship_to_name TANK,

  ship_to_address TANK,

  ship_to_city TANK,

  ship_to_state TANK,

  ship_to_zip TANK,

  status_or_appt_reason_cd TANK,

  event_description TANK,

  shipment_status_cd TANK,

  shipment_event_date TANK,

  shipment_event_time TANK,

  event_time_zone TANK,

  event_city TANK,

  Event_State TANK,

  event_zip TANK,

  customer_confirm TANK,

  delivery_confirm TANK,

  tracking_number TANK,

  mail_rec_weight TANK,

  mail_rec_weight_cd TANK,

  mail_red_qty TANK,

  INSERT_USER "1"

  INSERT_USER_DATE sysdate,

  INSERT_STATUS_CODE CONSTANT 'I')

• Calculation of the free space in a data file

  Hello
  
  I use Oracle database 11g (11.1.0.6). I need to calculate available disk space that exist in a special database for inserting new records. I look in the table dba_data_files for this information. I use the sub query to get the value of maxsize allocated in GB this until datafile that it can grow.
  
  Select maxbytes/1024/1024/1024 of dba_data_files where nom_tablespace = 'XXXX '.
  
  How to get the disk space available for the insertion of new records in a particular data file or a bunch of data files in a tablespace?
  
  
  Kind regards
  
  007

  007 wrote:
  Hi Helios - Gunes EROL,

  The Select sum (bytes) / 1024/1024/1024 "GB" of dba_data_files where nom_tablespace = 'xx' query tells you the sum of all files of size data in a tablespace. But I need the free space available in these data files. How to get it?

  Kind regards

  007

  Use

  select sum(bytes/1024/1024/1024) GB from dba_free_space where tablespace_name='tablespace name'
  

  Know schemae storage space

  select default_tablespace from dba_users where username='schema name';
  

  Know the perticular table tablespace

  select TABLESPACE_NAME from dba_tables where table_name='table name';
  

  Utimetly you will be insert in tablespace, little matter how many data file you have and how many girl and how many of them have the space available.
  So just to worry when the table space is saturated.

• easy transfer can be used to reload the data files after formatting hard drive?

  I have been informed by level microsoft 2 I have to reformat my hard drive to fix the problem with windows backup (snapshot won't work).  easy transfer will copy all THE data files, including OUTLOOK 2007 on hard drive and then I can reinstall on reformatted drive.

  Easy transfer copy some things but not all things. He does more that can make a simple copy/paste (such as the settings for example) but, for example, not programs transfer (those who need to be put back in place).  Here is a description of what it does (and does not): http://support.microsoft.com/kb/928635.  It will transfer Outlook 2007 PDF files and other personal data if they are selected - you need to know which files you need and where to select them - but it won't transfer the program (which must be put back in place).  It must be run before you reformat the hard disk to collect data and then you can transfer everything what you have registered once the system is re-installled.  You would do the re-setup prior to the transfer.

  I hope this helps.

  Good luck!

  Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

• Why the size of the system table space is limited to 16383 MB

  Hello
  I use 10.2.0.3.0 on linux 64-bit
  
  I want to know why the sysaux tablespace data file size is limited to 16383 MB as stated in the Enterprose management, I use linux 64-bit
  
  SYSAUX tablespace
  
  Size of the file (KB) 716800
  Yes AutoExtend
  Increment 10240 KB
  16383MB maximum file size
  16383MB maximum file size

  A data file can have up to 4 MB blocks (http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/limits002.htm#i287915), do the math:

  4194304 * 4096 = 17179869184 = 16384 GB (4096 = database block size)

  HTH

  Enrique

• Can a VPN 3005 cause multiple IP addresses on the external interface?

  Nice day

  Can a VPN 3005 cause several IPS on an external interface?

  I expect to use it in an environment that has 2 ADSL connections to an internet service provider. For the sake of the exercise, we could call them ROUTER1 and ROUTER2.

  We have a few VPN we always want to spend by ROUTER1 and some VPN we always want going through ROUTER2.

  Is this possible?

  Thank you very much

  No, not possible, sorry.

• can we take copy of rman backup image in several places

  Hi all

  We are planing to move the database from the old warehouse to new storage on the same server.

  planing to use RMAN image copy to copy the files db destocking former new storage, then switch database to copy.

  Now dbfiles on/U01, / U02, /u03, /u04, and we are planing to move to the new storage /u05 / u06 /, /u07

  Is it possible that I can copy all the dbfiles in /u05 / u06, / u07

  Backup in the database copy format ' / u05

  As I know that I can move one place. Is there any copy of way in several places using the copy of the image.

  Please suggest.

  Thank you

  You can use DB_FILE_NAME_CONVERT to make the operation easier.

  Take a look at The Concepts of RMAN backup

  Thank you!!

• Can a vDR device cause multiple backup destinations?

  I tried adding the shares network, adding that a different network share seems to remove the network share previously implemented at which the current backup operation is set.

  I want two shares of different network for a device with two jobs vDR, each backup operation goes to a different network share.

  How can I do this? 1.2.1 using latest version vDR.

  Alternatively, if each camera vDR can talk only to a single network share data store, I can set up another camera vDR.

  Thank you, Tom

  CIFS is not a recommended destination and can be much slower. If you want an accessible destination I would add a couple of NFS shares as network data warehouses. Then add a normal VMDK unit vDR. You can do several (more than 2) virtual machine backups but as I've mentioned before that you will incur the trouble to write the cbt file for each additional backup done.

  I'd do more simple a test you can against 2 or 3 small VMs. run multiple backups. Check the speed of the restoration. Decide if you can live with the speed of the restoration. I'm not sure that this is the most appropriate use of the vDR unit.

• best way to reclaim the unused space in the data file

  I just want to know the best way to recover unused space especially in oltp using oracle 11 g 2.

  There are several options that you can consider.

  -alter table... move

  -alter table... retractable

  -Export / Import

  -Redefining online using the dbms_redefinition

  -resize datafile

  According to the business and downtime, you have, you can consider on one of them.

  A simple search on google with 'recover unused space' should give you all the procedures, the methods mentioned above.

  Kind regards

  Suntrupth

• Can a single button cause multiple targets, based on the value of the point?

  I have a button on a form and based on the value of an element, when clicked, pages must be accessible. Is this possible to do? If so, any ideas are greatly appreciated.
  
  Request Express 3.1.2.00.02

  It's pretty simple to do using conditional branches. Create a branch to the place of the appropriate branch (for example on submit: after treatment...) for each target page and series PL/SQL Expression condition for each branch:

      :request = ''
  and : = 
  

  its replacement by < button_name >, < nom_element > and < item_value > with the values appropriate to your application (and change the '=' in the expression of the agenda if some other condition is used). The integrated attribute REQUEST contains the name of the button that submits the page.

• How to put data files in two places where test discount via RMAN

  Hi all

  Please suggest on this.

  Thank you

  Billon.

  I realize that this post is old and the OP seems to have made a validation and then disappeared, but Recovery Manager (RMAN) is probably the best place to ask this question.

• How to get the default path of the data of a table space file

  I used below the sql statement to create a table space:

  CREATE A TABLESPACE DATAFILE AAA BBB SIZE 10 M AUTOEXTEND OFF...

  Notice, I do not give a full path instead of a file name, and then ask questions relevant to tables

  get the full path of the data file, assume that it's path below:

  d:\oracle\...\BBB

  So I don't think that there is a default path that oracle can use it to create the data file. My question

  is how to get this default path before creating a table space.

  Thank you very much.

  Hello

  I did similar simulations for you, then it could be seen easily:

  SQL > Show parameter db_create_file_dest

  VALUE OF TYPE NAME

  ------------------------------------ ----------- ------------------------------

  db_create_file_dest chain

  SQL > SELECT NAME, VALUE OF V$ PARAMETER

  2 where lower (name) = "db_create_file_dest;

  NAME

  --------------------------------------------------------------------------------

  VALUE

  --------------------------------------------------------------------------------

  db_create_file_dest

  It has the value NULL. Then where my datafile is going?

  SQL > create tablespace TEST datafile 'test01.dbf' size 10 M;

  Created tablespace.

  SQL > select file_name

  2 of dba_data_files

  3 where nom_tablespace = 'TEST ';

  FILE_NAME

  --------------------------------------------------------------------------------

  /U01/app/Oracle/product/12.1.0/Db_1/DBS/Test01.dbf

  When you check the alert logs, it will not show you the location of the data file. It will tell you what exactly you ran.

  ..

  ..

  Completed: drop tablespace test whose content and data files

  create tablespace datafile 'test01.dbf' size 10 M TEST

  Completed: create tablespace TEST datafile 'test01.dbf' size 10 M

  ..

  ..

  You can not SQL user * more? Well, I would say that, when you run the CREATE TABLESPACE command, is where you run the command:

  SQL > select file_name

  2 of dba_data_files

  3 where nom_tablespace = 'TEST ';

  FILE_NAME

  --------------------------------------------------------------------------------

  /U01/app/Oracle/product/12.1.0/Db_1/DBS/Test01.dbf

  
  

  So, you should get the location of your data file. Alternatively, you can run the query in the parameter $ v so that you know your default data file location.

  I hope this helps.

  Thank you.

  Kind regards

  Gaetan