Mechanism of Oracle to the field always increment by 1

Hello

Is there is no built-in mechanism for Oracle to ensure that the fields will always increment by 1? I tried with the sequence but it only ensure that this counter is unique, but not a guarantee which is always increment by 1.

If it is imposible for Oracle, please just said I have to implement my own (I am beginner as developer Oracle). Thanks for the suggestions.

Best.

A simple question, you have to deal with this scenario

1 the user assigns the value N

2 the user must wait before they can allocate the value N + 1 - in which case your entire system is single-user.

2 the user can allocate N + 1 before commitments of user 1 - if so, how to retrieve the value N if the user falls down after 2 user agrees?

A strategy (which I described in "Practice Oracle 8i") would be to connect to a value, and then remove the paper as part of the transaction that uses it. If your condition is auditing you have then a trail that shows ALL the values - the table operation, or the table of newspaper as "allocated but unused.  You cannot use Oracle sequences, you must have a 'table of the sequence' to contain the name and the value the more recent, and you must increment the counter and put it in the newspaper through a stand-alone transaction table. You also need a trigger on the table to remove the entry from the table in the transaction log.

Concerning

Jonathan Lewis

Tags: Database

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