convert slq server query

[Paulo Betim]

delete
TB
FROM (SELECT DISTINCT
B.MesRef, b.Segto_Merc, b.Modulo_CG, b.Modulo_G1
FROM tb as a
RIGHT OUTER JOIN TB AS b
ON a.Segto_Merc = b.Segto_Merc AND a.Modulo_CG = b.Modulo_CG AND a.Modulo_G1 = b.Modulo_G1 AND a.MesRef = b.MesRef
WHERE (a.Segto_Merc IS NULL OR a.Modulo_CG IS NULL OR a.Modulo_G1 IS NULL) AND b.MesRef = param_MesRef) AS C
WHERE TB.Segto_Merc = c.Segto_Merc AND TB.Modulo_CG = c.Modulo_CG
AND TB.Modulo_G1 = c.Modulo_G1 AND TB.MesRef = param_MesRef;