apply Schema.lookupType_nths_eq_lookupType
η : Type u_η
dec_η : DecidableEq η
sch✝ : Schema
sch : Schema
t : Table sch
ns : List (Fin (ncols t))
c : CertifiedName (Schema.nths sch ns)
⊢ Schema.lookupType (Schema.nths sch ns) c =
    Schema.lookupType sch { fst := c.fst, snd := Schema.hasNameOfNthsHasName c.snd }
no goals