Put a dummy column in a view

Hi,
How to add a dummy column like 'Status' and all its value as "Closed" in a view. This column
is not related to any table.

See example below. Hope this is what you want.
SQL> select * from tst_table;
        ID DEP        DET
        10 XXX        A
        10 XXX        B
        20 YYY        C
        10 ZZZ        D
SQL> create or replace view my_view as
2 select id,dep,det,(select 'Closed' from dual) Status from tst_table;
View created
SQL> desc my_view;
Name   Type         Nullable Default Comments
ID     NUMBER       Y
DEP    VARCHAR2(10) Y
DET    VARCHAR2(25) Y
STATUS CHAR(6)      Y
SQL> select * from my_view;
        ID DEP        DET                       STATUS
        10 XXX        A                         Closed
        10 XXX        B                         Closed
        20 YYY        C                         Closed
        10 ZZZ        D                         Closed
SQL>

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BR
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See example below. Hope this is what you want.
SQL> select * from tst_table;
        ID DEP        DET
        10 XXX        A
        10 XXX        B
        20 YYY        C
        10 ZZZ        D
SQL> create or replace view my_view as
2 select id,dep,det,(select 'Closed' from dual) Status from tst_table;
View created
SQL> desc my_view;
Name   Type         Nullable Default Comments
ID     NUMBER       Y
DEP    VARCHAR2(10) Y
DET    VARCHAR2(25) Y
STATUS CHAR(6)      Y
SQL> select * from my_view;
        ID DEP        DET                       STATUS
        10 XXX        A                         Closed
        10 XXX        B                         Closed
        20 YYY        C                         Closed
        10 ZZZ        D                         Closed
SQL>

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Shridar I havent defined it but the derived column has been picked up as not null which is strange
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So, given:
create table PERSON (
SSN VARCHAR2(12),
FIRST_NAME VARCHAR2(25),
LAST_NAME VARCHAR2(25),
STREET VARCHAR2(40),
CITY VARCHAR2(30),
STATE VARCHAR2(30),
ZIP VARCHAR2(15),
COUNTRY VARCHAR2(35))
create view PERSON_VW as
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FIRST_NAME,
LAST_NAME,
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from PERSON
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select DDL from metadata where table_name = 'PERSON_VW' and column_name = 'FULL_NAME'
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Thanks!

>
Hi again Barry,
When I queried user_tab_columns (or dba_tab_columns or all_tab_columns), I have the following list of columns:
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COLUMN_NAME
DATA_TYPE
DATA_LENGTH
DATA_PRECISION
DATA_SCALE
NULLABLE
COLUMN_ID
DEFAULT_LENGTH
DATA_DEFAULT
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Maybe what you need is just SQL Developer (great tool, if you don't have it, get it!).
And it's free (as in beer - not as in speech! :( )
Beside the connections tab is a "Reports" tab with various, as you might expect ;), reports.
One of them is on the Tables - with (some) DDL. This will work as a once-off if that's what
you need?
Otherwise there's the SQL tab if you open a table under connections - it's very complete - sample
at bottom of post.
HTH,
Paul...
(Ultimately, I'm diagnosing problems in existing databases that have views already created so
I don't have the option of considering virtual columns.)Quelle surprise ;(
Paul...
-Barry
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TABLESPACE "USERS" PCTTHRESHOLD 50;
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IS
'Primary key of countries table.';
COMMENT ON COLUMN "HR"."COUNTRIES"."COUNTRY_NAME"
IS
'Country name';
COMMENT ON COLUMN "HR"."COUNTRIES"."REGION_ID"
IS
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IS
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Hi all.
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Hi Experts,
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Error Codes: IRVLJWTA:OI2DL65P
Location: saw.httpserver.processrequest, saw.rpc.server.responder, saw.rpc.server, saw.rpc.server.handleConnection, saw.rpc.server.dispatch, saw.threadpool.socketrpcserver, saw.threads
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Mark as correct if it is helpful.
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Extract from Oracle Documentaion:
Use the ALTER MATERIALIZED VIEW statement to modify an existing materialized view in one or more of the following ways:
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Put a dummy column in a view

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