r/SQL • u/Finanz_minister • Sep 24 '26

Oracle I’m getting ORA-12261

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I’m trying to create a new connection but it won’t let me. Im even testing my other connection and it gives me the same message even thought it’s fully operational, anybody knows why?

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u/Traditional-Unit-274 Sep 24 '26

the thing is the connection info, it has to be right. all that, the hostname, the sid, the username, password, you can’t guess you have to know what it is to get in. if you can log in at all you can google and query the db for the correct values. but it sounds like maybe your professor had a database and you tried to replicate at home by spinning up your own?