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GROUP BY d.id_documentacion
ORDER BY dd.t' at line 8
SELECT d.id_documentacion
FROM documentacion_privada d INNER JOIN documentacion_privada_desc dd
ON d.id_documentacion = dd.id_documentacion
INNER JOIN secciones_privadas s
ON s.id_seccion = d.id_seccion
INNER JOIN secciones_privadas_desc sd
ON s.id_seccion = sd.id_seccion
WHERE d.publicar=1 AND d.id_seccion IN () AND d.id_administrador=0
GROUP BY d.id_documentacion
ORDER BY dd.titulo