They are 28 fields:

SELECT nrh10300.Numemp, nrh10300.Area, nrh10300.Cate, nrh10300.Sdo_dia, nrh10300.Sec, nrh10300.Subsec, ;
nrh10300.Dir, nrh10300.Empresa, nrh10300.Cta_gasto, nrh10300.Depto, nrh10300.Programa, nrh10300.Consec, ;
nrh10300.Tnoemp, nrh10300.Desup, nrh10200.Nomemp, nrh10200.Rfc, nrh10200.Alta_nom, nrh10200.Alta_gob, ;
nrh10200.Fec_baja, nrh10200.Cla_sin, nrh10200.Quin_dia, nrh10200.Num_quin, nrh10200.N_imss, nrh10200.Fonacot, ;
nrh10200.Curp, nrh10200.Tarchc, nrh14000.Col_emp, nrh14000.Telefono, nrh14000.Dir_emp ;

Not much eh?