An Error Was Encountered

Error Number:

ERREUR: erreur de syntaxe sur ou près de « and » LINE 1: ... on d.id = ad.id_document where ad.id_rubrique = and d.b_ac... ^

select d.id as id_doc, d.titre as titre_doc from documents d join documents_rubriques ad on d.id = ad.id_document where ad.id_rubrique = and d.b_actif='t' order by d.date_modification desc