About the command order by

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I have a problem with the command order by with the Postgresql version 6.1 :
my first query work good :
	$requete=3D"select ent.* , activ.* from entreprise ent, activite activ wher=
e
activ.numactivite =3D $activite";

But when I put an order by into, I have a bug :
	$requete=3D"select ent.* , activ.* from entreprise ent, activite activ wher=
e
activ.numactivite =3D $activite order by ent.effectif";

Do you know this problem and how to resolve it.

Thanks a lot for a quickly response.

Terre =E0 D=E9lices
Christophe TOUDIC
8 rue Hermann Frenkel
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T=E9l : 04 78 61 46 33
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