select A.NUM_DOC,A.VALOR,B.credito,a.status_t,b.status_t
 from cptb00001 a,cptb00003 b
where a.cod_sp = b.cod_sp and a.cod_sp_sec = b.cod_sp_sec and
a.cod_sp = 23 and a.tipo_doc = "FT" and b.fecha      between
"010499" and "300499"
and a.valor != b.credito and
b.cuenta_no = "2113"
and a.num_doc = b.factura