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Convert Oracle dmp file

Oracle Database Tips by Donald BurlesonMarch 22, 2013

Question:  How do I take a data pump dmp file and convert it into a readable flat file?  I want to take a dmp file and make a comma delimited file.  Can we create flat file from dump file created by expdp and exp?

Answer:  If you use exp, you can extract the table and index definitions (DDL) from a dmp file into SQL statements through the use of the SHOW=y option in the imp command.  There is a similar option with the impdp command, the sqlfile argument.

The data within a dmp file is stored in a proprietary binary format, but there are some plain characters that can be extracted with the UNIX/Linux "strings" command:

strings myfile.dmp > plaintest.txt

The internal formatting of a dmp file is easily deciphered by any competent programmer, and there are many scripts that will convert a Oracle dmp file, or you can write your own converter using Oracle shell scripting.
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