How do I fix error 17002?

First check the tnsnames. ora file and ensure that it points to the correct server and port. If the Forms server is on another machine, test the TNS resolve with tnsping from the command prompt. Finally, check the listener.

How do I fix the network adapter problem in SQL Developer?

ora file check for Host and Port entry in Listener tag for valid hostname and port number. And if you are using TNSnames. ora file for validating the hostname and port number then search for the entry which has the same name as your SID and then check for host and port number entry in that particular tag.

How do I practice SQL in SQL Developer?

Summary

1. Create a database connection.
2. Add a new table using the Table Dialog Box.
3. Change a table definition.
4. Add constraints.
5. Add data to a table.
6. Access data.
7. Generate a report.
8. Create and execute PL/SQL.

How do I connect SQL Developer to Oracle 10g Express Edition?

This How-To details how use Oracle SQL Developer to connect to your Oracle Database 10g Express Edition (XE).

1. Startup Oracle SQL Developer.
2. From within the Connections navigator on the left side of the tool, right-click on Connections.
3. Select New Database Connection.
4. Enter the following information:
5. Click Connect.

How do I fix ORA 12505 error in SQL Developer?

And I solved it by using SERVICE NAME (an alias) instead of SID:

1. Open file tnsnames.ora from your ORACLE_HOME folder. In case you don’t know its location, do the following steps.
2. In tnsnames.ora file, look for the line which contains the SERVICE_NAME.
3. Select Service name and type above name, TEST success and you’ve done!

How do I restore default settings in SQL Developer?

7 Answers. You can go to the upper tab “WINDOW” and then click “Reset Windows to factory settings”.

How can I practice SQL queries at home?

1. 4 steps to start practicing SQL at home. Download MySQL and do it yourself.
2. Download the software. Your first task is to download database software.
3. Create your first database and data table. Great — we now have the software we need to get started.
4. Get your hands on some data.
5. Get curious.

How to fix SQL Developer vendor error 17002?

Fix SQL Developer vendor error 17002. Question: I was trying to connect to Oracle through SQL developer, and I see this error. Answer: In your case the “Vendor code 17002” is the equivalent of the ORA-12541 error: It’s most likely that your listener is down, or has an improper port or service name. From the docs:

Why do I have an Oracle SQL Developer error?

Before you’re able to connect with Oracle database, SQL developer must be configured correctly and listener has to be running. The listener handles databases connection, by default the SQL settings does not need listener for connecting to database and so it has to be configured. SQL Error 17002 Sqlstate 08006.

When to look for vendor code 17002 in Oracle?

When you do a connection request in Oracle, we send the request to a host H and port P (as you’ve seen from the SQL Developer connection screen). You’ll typically see 17002 if we cannot successfully get to the listener. So things to look for:

What to do about SQL error 17002 SQLSTATE 08006?

Restarting the listener has work for some, you should give it a try. So far these are some of the best fixes to SQL Error 17002 Sqlstate 08006, the problem most of the time has to do with listener and you need to ensure that it’s pointing to the correct port and server. Once you can figure this out, you’ll definitely get rid of the problem.