how to quickly move data to oracle

hi,I meet a problem,i want to move huge data from ensemble to oracle.it`s about 3years business data.i have tried some case！

1. EnsLib.SQL.OutboundAdapter

i parse the data one by one,and translate it into inser or update sql statement then write to Oracle，it·s most slowly，and take more disk space。

2.save the data to a new table，and then use dbeaver transport data to oracle。

3.user linktable. save object as insert，but，i can·t user %openid method.

hope to find a high-efficiency way！