What is the limit for the creation of a primary key?

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• Another user changed the row with a primary key oracle.jbo.Key]

  I see many discussions about this error, but still cannot understand the difficulty that I need in my scenario.

  I am an Oracle Developer and completely new to ADF, please bear with me.

  I use JDeveloper 11.1.1.9.0

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  Hello @ll,
  
  during an update of the database, I lost a foreign key between two tables. The tables are called werteart and werteartarchiv_pt. Because of its size, werteartarchiv_pt is a partitioned table. The missing foreign key was a constraint on werteartarchiv_pt table referencing werteart.
  
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  (1) why Oracle should temporary tablespace to create the foreign key? The foreign key uses the same columns as the primary key.
  
  is 2 (a) possible to change the statement without using the temporary tablespace?
  
  2 (b) if it is not possible to avoid the use of temporary storage space, is there a formula how to calculate the necessary temporary tablespace?
  
  (3) is it possible to modify data in tables while the foreign key is created or is the whole table locked during the process?
  
  Any help or advice is appreciated.
  
  Kind regards
  Bjoern

  RollinHand wrote:
  My questions now are, and I hope that someone is there who can answer all or part of it:

  (1) why Oracle should temporary tablespace to create the foreign key? The foreign key uses the same columns as the primary key.

  Because it is data validation to ensure that the foreign key are violated. If you had specified NOVALIDATE ACTIVATE in its creation then the existing data in the table should be checked and the statement must fill out instantly (future data added is enabled by the constraint).

  http://download.Oracle.com/docs/CD/B28359_01/server.111/b28310/general005.htm

  Search for "Enable Novalidate constraint State"

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  Hi people,
  
  I have a Scott user for example, I want to retrieve all tables primary key column names in the user Scott.
  
  can someone help me please.
  
  Thanks in advance,
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• create materialized view log on the table without a primary key

  Hi all

  CREATE TABLE client_months 
  (
    SUBJ_CODE         NUMBER(4),
    SERV_CODE         NUMBER(4),
    DEBIT_CODE        NUMBER(4),
    PERIOD_NUM        NUMBER(2),
    PERIOD_NAME       VARCHAR2(40 CHAR),
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    MONTHES           NUMBER(4,2),
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  table created.
  
  CREATE UNIQUE INDEX client_months_UK  ON client_months 
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  index created.
  
  CREATE MATERIALIZED VIEW LOG ON client_months with rowid;
  
  CREATE MATERIALIZED VIEW client_months_mv 
  BUILD immediate 
  REFRESH FAST ON COMMIT 
  AS 
  SELECT * FROM client_months;
  
  ORA-12014: table 'CLIENT_MONTHS' does not contain a primary key constraint

  I don't want to refresh the mview when validation is performed on the base table.
  And I don't want to change the base table by adding a primary key.
  
  is it possible to create the mview journal using the unique index? or another solution?
  Please help
  Thanks in advance
  Naama

  Naamas wrote:
  No,
  I already read this post!

  Then you read wrong:

  SQL> CREATE TABLE client_months
    2  (
    3    SUBJ_CODE         NUMBER(4),
    4    SERV_CODE         NUMBER(4),
    5    DEBIT_CODE        NUMBER(4),
    6    PERIOD_NUM        NUMBER(2),
    7    PERIOD_NAME       VARCHAR2(40 CHAR),
    8    FIRST_MON_DAY     DATE,
    9    LAST_MON_DAY      DATE,
   10    VALUE_MON_DAY     DATE,
   11    MONTHES           NUMBER(4,2),
   12    GARDENING_WEIGHT  NUMBER(5,4),
   13    REASON_CODE       NUMBER(5),
   14    STAMP_ACTION      VARCHAR2(1 CHAR),
   15    STAMP_CDATE       DATE                        DEFAULT SYSDATE,
   16    STAMP_DATE        DATE,
   17    STAMP_USER        VARCHAR2(15 CHAR),
   18    REGION_CODE       NUMBER(9)
   19  )
   20  /
  
  Table created.
  
  SQL> CREATE UNIQUE INDEX client_months_UK  ON client_months
    2  (SUBJ_CODE, SERV_CODE, DEBIT_CODE, PERIOD_NUM, REGION_CODE)
    3  /
  
  Index created.
  
  SQL> CREATE MATERIALIZED VIEW LOG ON client_months with rowid
    2  /
  
  Materialized view log created.
  
  SQL> CREATE MATERIALIZED VIEW client_months_mv
    2  BUILD immediate
    3  REFRESH FAST WITH ROWID ON COMMIT -- pay attention to WITH ROWID
    4  AS
    5  SELECT * FROM client_months
    6  /
  
  Materialized view created.
  
  SQL>
  

  SY.

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  There is a second table I want to use to delete records of T1 T2. It contains als F1 and F2.
  
  I want to do something like this
  

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  Thank you!
  
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  delete from T1
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