auto increment the column

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I have created a table and now i have to set the auto increment property to the created table field 'id' without using 'create sequence'.
NOTE:the field 'id' is not a primary key
Thanks in advance.

Posted 30-Dec-11 2:14am

skkworld

Updated 30-Dec-11 2:16am

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Wendelius · Answer 1 · 2011-12-30T02:21:00

AFAIK in Oracle there's no such concept as auto increment column. Sequences are used to generate surrogate keys. The value given by a sequence can be used anywhere, not only in primary keys.

You can mimic the behaviour of auto incerement columns by creating an insert trigger on your table and setting the field value using a sequence in the trigger. This way the client application 'thinks' the column is autogenerated.

RaviRanjanKr · Answer 2 · 2011-12-31T20:57:00

In Oracle, you can create an autonumber field by using sequences. A sequence is an object in Oracle that is used to generate a number sequence. This can be useful when you need to create a unique number to act as a primary key.
Reference Link :-
Oracle/PLSQL: Sequences (Autonumber)[^]
Creating BETTER auto-increment columns in Oracle[^]

auto increment the column

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