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I have two similar Oracle installations, one at my office and one at my house. I have taken a full dump of all the work I did during the week and need to import it to my office system. What command can I use to just import and overwrite the existing tables in my office installation, since the dump content is more current? My export was done with the following command: exp username/password@sid full=n file=C:dumpfile.dmp log=C:dumplog.log owner=(userid) statistics=none
Oracle will not overwrite the old tables. If the table already exists, you will get an error when importing the table unless the IGNORE=Y parameter is used. If this parameter is used, Oracle will not overwrite the data in the table, but will append to the table. So in your scenario, the IGNORE=N parameter runs the risk of getting duplicated data. It is best to drop the tables in the dump file before importing the new data.
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