About update query

Question

Hello :),
I am a MS SQL Server expert [;)]. trying to learn ORACLE.
I tried to assign some value to a variable in an update query. I got error message that virtual columns are not allowed. This is very important to get rolling effect.
Can some one please guide me about how to get rolling effect if we can not assign a value to a variable in an update query.
Thanx in advance.
Nishu

Answer 1

hello sgalaxy and gintsp, thanx for ur reply.
My reply is so late because for some reason I was not able to log on to this site.
There is some good reason why I need this. I am giving code and error messages below, please guide me.
==============================
I am trying this thing in procedure. I am using ORACLE DATABASE EXPRESS EDITION
Here is the code.
create or replace procedure "PROC1"
is
TYPE Bal_Collect IS TABLE OF NUMBER;
Collt Bal_Collect := Bal_Collect(100);
begin
Update empAccount Set Bal = Collt(Collt.Last) Returning Bal BULK COLLECT INTO Collt;
end;
Error message
Compilation failed,line 6 (02:20:45)
PLS-00425: in SQL, function argument and return types must be SQL type
Compilation failed,line 6 (02:20:45)
PL/SQL: ORA-00904: : invalid identifier
Compilation failed,line 6 (02:20:45)
PL/SQL: SQL Statement ignored
BUT FOLLOWING UPDATE STATEMENT WORKS
Update empAccount Set Bal = Collt(1) Returning Bal BULK COLLECT INTO Collt;