I discovered an interesting quirk in using the Database Configuration Assistant to create and delete a database....
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
When I installed Oracle, and I selected to have the starter database installed, this created an entry called ORACLE_SID in the registry that tells it what database to mount and start with an instance as a default. When I used the DBCA to create a second database, I discovered that the new database overwrote the default value in the registry, so in order to connect to the original database, I have to type its SID into the host string field in the SQL*Plus login box. How did the new database become the default without actually doing the change manually?Then, I deleted the new database using the DBCA, and guess what it did? It deleted the ORACLE_SID entry in the registry for the default_SID. I had to re-enter that entry and type in the SID of the default database again, or else I had to enter the SID every time when using SQL*Plus. Do you know what happened here?
You must have specified the same Oracle Home directory for both databases. If you had specified a different Oracle Home, you would have separate entries in the registry.
Related Q&A from Azim Fahmi
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.