Updating oracle sequence Free adult chatchat

13-Jan-2017 23:51

It is unlikely, however, that any users of 9i Release 2 (9.2) will wish to use the 9.0 method and we shall see why below.To be able to use flashback query, we require the following system elements: A small note on new tables, which applies to both releases of 9i, is that it might not be possible to begin flashback queries against them immediately.This short article introduces flashback query, a new feature of Oracle 9i.Flashback query enables us to query our data as it existed in a previous state.

Note that the initial ALTER SESSION is simply a convenience to enable a consistent timestamp format mask without having to supply it explicitly. The extended FROM clause is simple and intuitive to use and is more likely to encourage developers to use flashback query.

Flashback query does not need to be explicitly enabled and disabled via package calls; it is invoked directly by this syntax.

We will repeat the earlier example but this time using 9.2 flashback query.

Because a timestamp is mapped to an SCN number every five minutes, the SCN offers a much finer level of precision for flashback.

We will begin, therefore, by capturing the current SCN and permanently updating our sample data.

Note that the initial ALTER SESSION is simply a convenience to enable a consistent timestamp format mask without having to supply it explicitly. The extended FROM clause is simple and intuitive to use and is more likely to encourage developers to use flashback query.

Flashback query does not need to be explicitly enabled and disabled via package calls; it is invoked directly by this syntax.

We will repeat the earlier example but this time using 9.2 flashback query.

Because a timestamp is mapped to an SCN number every five minutes, the SCN offers a much finer level of precision for flashback.

We will begin, therefore, by capturing the current SCN and permanently updating our sample data.

We'll move straight onto an example to show how this works.