oracle sql 开发者连接

Question

I tried to install oracle sql developer in windows 7 32 bit for this first i install jdk 8 and then i install this file sqldeveloper-4.1.3.20.78-no-jre from oracle website .. then when i run sqldeveloper application it shows this

check image

then this shows create new connection now when i create connection it shows error check image

how to solve this error?

Answer 1

You need to install Oracle Express Edition (XE) and set it up to run on your computer, on port 1521 - for your connection to work.

SQL Developer is just a client - there's no database there, unless you've put it there.

Answer 2

You need to have a running database to use with SQL Developer. If you haven't installed it yet follow the official documentation . If you do have the database but can't connect to it, make sure that

• The listener is up and running on the machine you're trying to connect to (in your case it's localhost )
• You've provided the correct port number and SID

Answer 3

Apart the suggestions of @Nikita and @thatjeffsmith, I highly suspect the matter is that you are using the pre-existing user hr that you didn't create by yourself but that was created during installing your Oracle Express instance.

This user is by default locked . It must be unlocked by an administrator (for example SYSTEM user).

After unlocking hr user, don't forget to grant to it CONNECT and RESOURCE roles. Find more details on this page.