This is a short tutorial on showing you how to setup SQL developer to use your tnsnames.ora file for new connections. I am using SQL Developer Release 3. Getting Oracle SQL Developer to use Tnsnames.ora files to define database connections is a lot easier than you might think. Here's what you need to connect. Home » SQL & PL/SQL » Client Tools » PL/SQL Developer & tnsnames.ora 10g. PL/SQL Developer & tnsnames.ora 10g [message #543403 is a reply to message #311182]. I am evaluating Oracle SQL Developer. My tnsnames.ora is populated, and a tnsping to a connection defined in tnsnames.ora works fine. Still, SQL Developer does not.

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