Fragmentation of data file

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• To reduce a data file

  Hi all
  
  Database version: 11 GR 2
  
  I have a tablespace that has consumed about 32 GB of space. But if I check the used space then its only 16 GB. When I tried to resize the data file, it throws the error
  

  ORA-03297: file contains data beyond the value required to RESIZE

  According to my understanding, there is no continuous blocks that exist in the database because of the fragmentation can be and it is there not able to resize. If I export the tablespace using datapump and re-import it allows to free up space.
  
  But I want to know if there are alternative ways to do the same.
  
  Thank you
  Arun

  check
  ORA-03297 when resize a Datafile [ID 578793.1]
  How to solve an ORA-03297 when resizing to a data file by finding the Highwatermark [ID 130866.1] table

• Not able to reduce the size of data file

  Hi all
  I use Oracle Database 11.2.0.2 etdansl ASM instance. Today, I noticed that the use of the disk is almost full in my disk groups. I thought so to reduce the size of large size Tablespace data files.
  
  Select file_name, bytes/1024/1024 of dba_data_files where nom_tablespace = 'FRARDTA9T ';
  
  FILE_NAME BYTES/1024/1024
  ------------------------------------------------------------------------- -------------------------------------
  +DATAJDFSWM/t1erp90d/datafile/frardta9t01.dbf 81000
  
  ALTER database datafile '+ DATAJDFSWM/t1erp90d/datafile/frardta9t01.dbf' resize 40000M;
  
  I get the following error.
  
  
  ERROR on line 1:
  ORA-03297: file contains data beyond the requested value of RESIZING
  
  Here is the result for DBA_FREE_SPACE
  
  
  SQL > select * from dba_free_space where nom_tablespace = 'FRARDTA9T ';
  
  NOM_TABLESPACE, FILE_ID, BLOCK_ID BYTES BLOCKS RELATIVE_FNO
  -------------------------------------------- ---------- -------------- ---------- ----------- -----------------
  104 97728 5767168 704 1024 FRARDTA9T
  104 189016 4521984 552 1024 FRARDTA9T
  104 277016 5046272 616 1024 FRARDTA9T
  104 277680 655360 80 1024 FRARDTA9T
  104 1630336 3288334336 401408 1024 FRARDTA9T
  104 2031744 4160749568 507904 1024 FRARDTA9T
  104 2539648 4160749568 507904 1024 FRARDTA9T
  104 3047552 4160749568 507904 1024 FRARDTA9T
  104 3555456 4160749568 507904 1024 FRARDTA9T
  104 4063360 4160749568 507904 1024 FRARDTA9T
  104 4571264 4160749568 507904 1024 FRARDTA9T
  104 5079168 4160749568 507904 1024 FRARDTA9T
  104 5587072 1543503872 188416 1024 FRARDTA9T
  104 5775616 2616197120 319360 1024 FRARDTA9T
  104 6094976 4160749568 507904 1024 FRARDTA9T
  104 6637472 2803630080 342240 1024 FRARDTA9T
  104 7550488 558694400 68200 1024 FRARDTA9T
  104 7618688 4160749568 507904 1024 FRARDTA9T
  104 8126592 4160749568 507904 1024 FRARDTA9T
  104 8634496 4160749568 507904 1024 FRARDTA9T
  104 9142400 4160749568 507904 1024 FRARDTA9T
  104 9650304 4160749568 507904 1024 FRARDTA9T
  104 10223520 786432 96 1024 FRARDTA9T
  
  Please suggest me how to solve this problem... There's fragmentation the culprit who don't let not releasing me a space?
  
  -Saha

  the tablespace is fragmented maybe you defragment to free up space. There are several features to do more or less effective.

  -change the movement of the table / index
  exp/imp
  -reduce the space
  -dbms_redefinition
  -DEC

  each technology has advantages and disadvantages...
  I suggest starting by shrink space, but do not start with larger items...

  HTH

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