Let two ORACLE databases coexist

If you have installed Oracle9I and then installed ORACLE10G, you can use TOAD or PLSQL Developer

When you select a tool, the SERVICES Service of 9I Database is blocked.

So how can we make two ORACLE databases coexist peacefully? Let's take a look at the solution below:

Modify the PATH in the environment variable and put the ORCALE9I address E: \ oracle \ ora92 \ bin at the beginning, because the system will give priority to the first address in the PATH by default. 10g listening service and so on.