T</TT
>,
    <TT
CLASS="COMMAND"
>UPDATE</TT
>, or <TT
CLASS="COMMAND"
>DELETE</TT
> is applied to
    the base relation in the appropriate way.  Views that are
    <SPAN
CLASS="QUOTE"
>"simple enough"</SPAN
> for this are called <I
CLASS="FIRSTTERM"
>automatically
    updatable</I
>.  For detailed information on the kinds of view that can
    be automatically updated, see <A
HREF="sql-createview.html"
>CREATE VIEW</A
>.</P
><P
>    Alternatively, the operation may be handled by a user-provided
    <TT
CLAS