1. Open the oracle database client, click the right mouse button to add the database to the tree structure
Host name: It is the IP of the host where you installed the server
Port number: default
SID: "orcl...." which you named yourself when you installed the database
Network service name: default
The final effect is as follows:
2. Expand the tree node, select "Security" --> "User", right-click the user, click "Create", enter the name of the user to be created, for example: "BJQ"
After all is completed, select the "Role" item, check "CONNECT", "DBA", and "RESOURCES", and click the Create button to complete.