>.  Using <TT
CLASS="LITERAL"
>FOR UPDATE</TT
>
     prevents other sessions from changing the rows between the time they are
     fetched and the time they are updated.  Without <TT
CLASS="LITERAL"
>FOR UPDATE</TT
>,
     a subsequent <TT
CLASS="LITERAL"
>WHERE CURRENT OF</TT
> command will have no effect if
     the row was changed since the cursor was created.
    </P
><P
>     Another reason to use <TT
CLASS="LITERAL"
>FOR UPDATE</TT
> is that without it, a
     subsequent <TT
CLASS="LITERAL"
>WHERE CUR