ALTER TABLE RETRACTABLE and DELETE are same as far as space is concerned. Right?

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  Hello
  in what table hours and jobs are stored

  Sanna says:
  Hello
  in what table hours and jobs are stored

  DBA_SCHEDULER_JOBS

• ALTER TABLE RETRACTABLE is possible online?

  RDBMS Version: 11.2.0.4

  Platform: Oracle Linux 6.4

  We have a database of CARS of Production 2 nodes very critical. To recover the space, we want to cut some large tables. The first table we'll shrink is a 300 GB, which is not partitioned with no LOB table.

  Here are the steps that we'll run.

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  Doc below said this can be done online. But, MOS DOC 1357878.1 said that it is not and you must use the DBMS_REDEFINITION package if you want to do it online.

  https://docs.Oracle.com/CD/E18283_01/server.112/e17120/schema003.htm

  The MOS article you are talking about is not correct. Outside the DOF at the end of a SHRINK lock when the high tide is shifted, SHRINK the SPACE is an online operation. DBMS_REDEFNITION is actually worse because you have DDL locks at both the beginning and the end. However, in both cases, it is the DDL that is blocked by other operations DML (and not the other way around) so that your users will have no problem. If the narrowing or the redefinition is blocked, you can suspend the database for a few seconds. I described how to do here,

  Database Quiesce

  --

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• Compare the implementation plans for SELECT and DELETE

  Hello
  
  Version: 10.2.0.3
  
  I REMOVE slow running in the Production db. I can't import and data, or run the REMOVE to get the Plan. For now, I managed to get the history of the plan.
  
  However I would like to know if it is reasonable to assume the plans to SELECT and DELETE the same?
  
  Rgds,
  Guenoun

  Gugui wrote:
  Hello

  Version: 10.2.0.3

  I REMOVE slow running in the Production db. I can't import and data, or run the REMOVE to get the Plan. For now, I managed to get the history of the plan.

  However I would like to know if it is reasonable to assume the plans to SELECT and DELETE the same?

  Rgds,
  Guenoun

  Do not understand your question.
  Because I can very easy do a:

  explain plan for
  remove from... where...;

  And then take a look at the plan generated in the PLAN_TABLE.

  However, I guess that plans for a DELETE and a SELECT statement must be the same, because they need to finish work on the same data, in any case...
  A simple test showed that I'm right.

     PLAN_ID OPERATION                      OPTIONS              OBJECT_TYPE                          COST CARDINALITY      BYTES
  ---------- ------------------------------ -------------------- ------------------------------ ---------- ----------- ----------
           3 DELETE STATEMENT                                                                       177714     7702839
           3 DELETE
           3 TABLE ACCESS                   FULL                 TABLE                              177714     7702839
           4 SELECT STATEMENT                                                                       179707     7702839 3928447890
           4 TABLE ACCESS                   FULL                 TABLE                              179707     7702839 3928447890
  

• ALTER table move & shrink space

  Hello
  What is the difference between alter table move and alter table shrink space orders
  Two free blocks not used in the table so that the free space will be given to the tablespace. Can you explain mw in detail or provide some links

  Sekar_BLUE4EVER wrote:
  Hello
  What is the difference between alter table move and alter table shrink space orders
  Two free blocks not used in the table so that the free space will be given to the tablespace. Can you explain mw in detail or provide some links

  ALTER table move would make invalid indexes and would require so rebuild you the index. In addition to him, it requires extra space in the tablespace, even that would be used for the creation of the object in double. So if you have a table of 10 GB, you need additional 10 GB free todo table alter move. Whereas in the narrowing is a place, the online operation, does not make you go and rebuild the index because it doesn't make them not disabled, requires no additional space to have.

  HTH
  Aman...

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• COMPARING TWO ROWS IN THE SAME TABLE AND DELETE THEM USING DELETION BLOCK

  Hi all
  I have a problem. I have an Employee table
  
  employee
  
  Emp_name Emp_id Emp_status Emp_date
  
  John 1 P 11-27-2010
  
  Mike 2 26/11/2010 S
  
  Simon P 3 22 / 11 / 2010
  
  Dennis C 4 25/11/2010...
  
  
  I compare the rows in the table and their employee_status if 'P', should I remove the... Here, I should delete lines 1 and 3 as their Emp_status is 'P '. I only use BULK DELETE... I tried to use the join query internal and deletion, but it does not work... Can someone help me...

  Ooops, it should be:

  and e2.emp_status in ('P', 'C')

  not

  and e2.emp_status in ('P', 'A')

  Here it goes:

  SQL> select  *
    2    from  employees
    3  /
  
  E EMP_NAME      EMP_KEY          X
  - ---------- ---------- ----------
  C John              123          1
  P Mike              123          2
  P Paul              123          6
  C Harry             124          5
  A Gass              125          7
  C Gass              125          7
  
  6 rows selected.
  
  delete  employees e1
    where 2 = (
               select  count(distinct e2.emp_status)
                    from  employees e2
                    where e2.emp_key = e1.emp_key
                      and e2.emp_status in ('P','C')
                 )
  /
  
  3 rows deleted.
  
  SQL>
  

  SY.

• ALTER INDEX REBUILD and large waste area

  Hello world.
  
  Concerns the RDBMS EE 10.2.0.2 on a box with 16CPUs. Non-standard initialization parameters:
  
  db_16k_cache_size = 3G
  pga_aggregate_target = 3G
  SGA_MAX_SIZE = 12G
  SGA_TARGET = 5G
  workarea_size_policy = AUTO
  
  I have a large table partitioned on a monthly basis with a local couple of bitmap index on this subject. Table and index are stored in different areas of storage. The index tablespace is
  
  EXTENT MANAGEMENT UNIFORM LOCAL 1 M SIZE
  16K BLOCKSIZE
  SEGMENT SPACE MANAGEMENT AUTO
  
  Nightly batch processing allows a few partitions index unusable then inserts/adds one part of the data and rebuilds the index with
  
  ALTER INDEX... REBUILD PARTITION... NOLOGGING PARALLEL
  
  When you are finished, query on DBA_IND_PARTITIONS shows that, for all the index, partition value SCOPES is much greater than the value of used BYTES, for example one of the partitions has 106 DEGREES (1 MB each so he made 106 MB space) while only 15 MB for the BYTES.
  
  I understand that during the reconstruction of the parallel process slave create segments in the tablespace of the index of destination so that spend a lot more space than this segment takes finally. But it also means that the space is not released. (Deallocation/shrinkage will not help). Same thing can be demonstrated by the queries on DBA_SEGMENTS and DBA_FREE_SPACE. Because of this behavior, I have huge waste of space in the tablespace to index.
  
  Can someone help, please?
  Przemek
  
  Allocate space for parallel process slave is documented in the book 'Data warehousing database Oracle 10 g 2', chapter 25 "run in parallel to assistance.

  user2038804 wrote:
  Concerns the RDBMS EE 10.2.0.2 on a box with 16CPUs. Non-standard initialization parameters:

  When you are finished, query on DBA_IND_PARTITIONS shows that, for all the index, partition value SCOPES is much greater than the value of used BYTES, for example one of the partitions has 106 DEGREES (1 MB each so he made 106 MB space) while only 15 MB for the BYTES.

  Przemek,

  I can confirm that there is a bug in 10.2.0.2 leading to inconsistent information related to size in DBA_SEGMENTS / DBA_EXTENTS after an index rebuild in parallel to a big clue, maybe a bug 4771672 in 10.2.0.3. If I remember correctly the information of MEASUREMENT is correct and the information provided in DBA_SEGMENTS is misleading.

  The Metalink note suggests to use DBMS_SPACE_ADMIN Procedure TABLESPACE_FIX_SEGMENT_EXTBLKS to correct erroneous information in the dictionary, but I don't know if it was the one we used when encountering the problem.

  Kind regards
  Randolf

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• Using insert and delete at the same time

  Good afternoon

  I want to do an insert on the table A in table B, while at the same time do a delete on table a.

  and I want to do with the procedures.

  Here is the script I came up with.

  INSERT the table_a (select * from table_b where status = was ') REMOVE from table_b where status = has '

  but I get an error ORA-00933.

  Got any ideas on how I can do this?

  Thank you

  try to:

  BEGIN

  Insert into table_b (select * from table_a where status = has ');

  remove from table_a where status = ';

  END;

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• Query to select other records and then the same in 2 tables

  Dear all,
  
  My database is 10 gr 2 and OS is Linux.
  I have 2 tables with the same fields and almost the same data. There are just a few different lines in table 1 and table 2 that do not match each other.
  
  I need to select these non-matching rows in both tables in a single request.
  
  Kindly help on that.
  
  Best regards, Imran

  You have at LEAST two ways!

  (SELECT * FROM table_A
  minus
  SELECT * FROM table_B)
  union all
  (SELECT * FROM table_B
  minus
  SELECT * FROM table_A)
  /
  

  For example:

  SQL> create table table_a (col_1 number,  col_2 varchar2(5));
  
  Table created.
  
  SQL> create table table_b (col_1 number,  col_2 varchar2(5));
  
  Table created.
  
  SQL> insert into table_a values (1,'A');
  
  1 row created.
  
  SQL> insert into table_a values (2,'B');
  
  1 row created.
  
  SQL> insert into table_b values (1,'X');
  
  1 row created.
  
  SQL> insert into table_b values (2,'Z');
  
  1 row created.
  
  SQL> insert into table_a values (3,'C');
  
  1 row created.
  
  SQL> insert into table_b values (3,'C');
  
  1 row created.
  
  SQL> commit;
  
  Commit complete.
  
  SQL>
  SQL> select * from table_a minus select * from table_b
    2  union all
    3  select * from table_b minus select * from table_a
    4  /
  
       COL_1 COL_2
  ---------- -----
           1 X
           2 Z
  
  SQL> (select * from table_a minus select * from table_b)
    2  union all
    3  (select * from table_b minus select * from table_a)
    4  /
  
       COL_1 COL_2
  ---------- -----
           1 A
           2 B
           1 X
           2 Z
  
  SQL>
  

  Hemant K Collette