PLSQL Developer configure Oralce11g connection
1. configure the environment variables: ORACLE_HOME = D: \ Program Files (x86) \ instantclient_11_2, TNS_ADMIN = D: \ Program Files (x86) \ instantclient_11_2 \ NETWORK \ ADMIN, NETWORK, and ADMIN. If they do not exist, create them manually.
2. Set PLSQL Developer:
1) Go to the program and choose tools> preferences.
2) set the Oracle main directory and OCI library. If the environment variables are correctly set, the drop-down lists will automatically find the environment variables.
Oracle main directory: D: \ Program Files (x86) \ instantclient_11_2, OCI Library: D: \ Program Files (x86) \ instantclient_11_2 \ oci. dll OK, save. Exit the program.
3) start the program and enter the logon interface. The database and other drop-down lists the connection names configured by tnsnames. ora in TNS_ADMIN. Enter the user name and password to log on.