IMP and EXP

imp 'sys/syspwd as sysdba' FROMUSER=fu TOUSER=tu FILE=file.dmp ignore=y log=d:\dump_imp.log

imp 'sys/syspwd as sysdba' FROMUSER=fu TOUSER=tu FILE=file.dmp TABLES=(t1,t2,...,tn)

exp hildesheim/hildesheim@arden file=hildesheim.dmp