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Connect To Oracle Using Easy Connect

Lewis Cunningham has published an excellent overview of the Oracle "easy connect" method which bypasses TNS:

Lewis explains how to connect to Oracle directly, without using a tnsnames.ora file to get the server name:
"Finally, Oracle has done something about it. TNS Easy Connect. Now, someone can give you a host name and optionally a port and service name. If your host name does not match your database name (and does it ever?), the service name is mandatory.

So let's say I want to connect using SQLPLUS to SCOTT using the password TIGER on the database DEV01 (which is listening on the default port). The host name is BIGSERVER. My syntax would be:

sqlplus scott/tiger@BIGSERVER/DEV01

If the port was 1616 instead of 1521, I would use

sqlplus scott/tiger@BIGSERVER:1616/DEV01

You can also connect to a URL using the Easy Connect Syntax. If you want to connect using this syntax, use syntax such as:

sqlplus scott/tiger@//BIGSERVER/DEV01"


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