database conflict [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical开发者_如何学JAVA and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

i search tricks to know and change the port of oracle, mysql and postgresql database, i mean a dos command or human machine interface.

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For the server, mysqld, the option is -P

see: mysql docs