I'm a complete newbie in oracle databases. I'm just curious on what mode is better when you want to migrate your database to another host by using data pumping. Lately, I'm having a problem on import datapump. I used export in schema mode and it seems that some of my packages were not stored correctly or somehow invalid. But when I checked my database if it has some invalid packages(not compiled after impdp) it appears that the packages were missing. I found out that I had an error about "Tablespace $tablespacename does not exist". I really don't have any idea where that tablespace came from because when I checked out my old database, it seems that $tablespacename does not exist. I looked over all the users but I really can't find that $tablespacename. Now I am too confused about where did I got that $tablespacename.