LASS="LITERAL"
>SET datestyle TO
      ...</TT
>.)
     </P
></LI
><LI
><P
>      
      <TT
CLASS="ENVAR"
>PGTZ</TT
> sets the default time zone.  (Equivalent to
      <TT
CLASS="LITERAL"
>SET timezone TO ...</TT
>.)
     </P
></LI
><LI
><P
>      
      <TT
CLASS="ENVAR"
>PGGEQO</TT
> sets the default mode for the genetic query
      optimizer.  (Equivalent to <TT
CLASS="LITERAL"
>SET geqo TO ...</TT
>.)
     </P
></LI
></UL
><P>

   Refer to the <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> command <A
HREF="s