possible to have a database without a primary index?

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  I have a quite stupid question, but it makes me doubt.
  Is it possible to have multiple databases in an Oracle Server? Are there so many bodies serving multiple databases on the Oracle server.?
  
  Thanks in advance
  
  Published by: user12229399 on 14-mar-2012 01:29

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  Published by: Johan Nilsson on 14 March 2012 01:31

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  >
  I was wondering if it is possible to have calculated columns, such as those below in the statement CREATE TABLE in Oracle. And if so, how do write you?
  >

  You did not mention your Oracle database version. Depending on your version, you can do. If you're on 11 GR 1 material or above, you can follow these steps:

  CREATE TABLE DTPartInv
       ( partinv_partnbr VARCHAR2(10) NOT NULL,
       partinv_prodname VARCHAR2(25),
       partinv_desc VARCHAR2(25),
       partinv_manufact VARCHAR2(25),
       partinv_instock INTEGER NOT NULL,
       partinv_category VARCHAR2(20),
       partinv_purchdate DATE,
       partinv_loc VARCHAR2(15),
      partinv_price NUMBER(6,2),
      partinv_vendor VARCHAR2(20),
      partinv_reorder INTEGER NOT NULL,
      partinv_serial VARCHAR2(20),
      partinv_flag as (case when partinv_instock < partinv_reorder then 'X' else 'O' end),
      CONSTRAINT DTPartInv_partinv_partnbr_pk
      PRIMARY KEY (partinv_partnbr)
    ) ;
  
  Table created.
  

  -Test it now

  -Box partinv_instock when <> _
  SQL > insert into DTPartInv (partinv_partnbr, partinv_instock, partinv_reorder) values ('Test', 10, 20);

  1 line of creation.

  -Box when partinv_instock = partinv_reorder_
  SQL > insert into DTPartInv (partinv_partnbr, partinv_instock, partinv_reorder) values ('Test2', 10, 10);

  1 line of creation.

  -Box when partinv_instock > partinv_reorder_

  SQL > insert into DTPartInv (partinv_partnbr, partinv_instock, partinv_reorder) values ('Test3', 20, 10);

  1 line of creation.

  SQL> select partinv_partnbr, partinv_flag from DTPartInv;
  
  PARTINV_PA P
  ---------- -
  Test       X
  Test2      O
  Test3      O
  
  3 rows selected.
  

  Happy?

  Therefore, always mention the version of database when you post specific requests as features differ from one version to the next.

  Concerning

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  "programmindragon" wrote in message
  News:[email protected]...
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