Shirish,
If the last 7 digits of this column has to be unique throughout the table,
why not, upon insert, move this value to another column in the table and
place a unique key on that column? This will prevent the record from being
inserted.
CREATE OR REPLACE TRIGGER TEST_TRIGGER
BEFORE INSERT
ON TEST_TABLE
FOR EACH ROW
begin
:new.number_column := to_number(substr(:new.full_column,-7,7));
end;
/
I have to ask the question - if a "part" of this data field is so important,
shouldn't it be in a separate column anyway? It seems to me that the design
of this data column is incorrect.
I think I would break it up into several pieces like:
existing value XYZ_A_LO0000_0000001
col_prefix = XYZ
col_header = A
col_log = LO0000
col_nbr = 0000001
Is this the primary key for the record? You could still have the PK be the
above 4 columns.
hope this helps
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
Sent: Tuesday, June 26, 2001 1:11 PM
To: Multiple recipients of list ORACLE-L
i am getting duplicate records if the whole (say XYZ_A_LO0000_0000001) value
is repeated without much probs..
but my prob is checking duplication of the last 7 digits..
Shirish Khapre, SE Rolta India Ltd.
Off Ph No. (+91) (022) 8326666,8262222,8300568
Ext'n 2730
Minds are like parachutes. They only function when they are open
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