Is it possible to have definitions of columns in a table to create

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?

* CREATE TABLE [Sales]. [SalesOrderHeader] (*
* [SalesOrderID] [int] IDENTITY (1,1) NOT for REPLICATION NOT NULL, *.
* [SalesOrderNumber] AS (isnull (do SO'+ CONVERT ([nvarchar] (23) [SalesOrderID], 0), no * ERROR *')), *.
* [Subtotal] [money] NOT NULL, *.
* [TaxAmt] [money] NOT NULL, *.
* [Transport] [money] NOT NULL, *.
* [TotalDue] AS (isnull (([SubTotal]+[TaxAmt]) + [Freight], (0))), *.
*)*

I would like to re - write the definition of table CREATE TABLE DTPartInv with partinv_flag AS a computed column when the value is X,
If partinv_instock < partinv_reorder and O
If partinv_instock > = partinv_reorder:

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      VARCHAR2 (1).
CONSTRAINT DTPartInv_partinv_partnbr_pk
PRIMARY KEY (partinv_partnbr)
);

>
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

Tags: Database

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