Win 8 64-bit system installed 64-bit Oracle, but there is no 64-bit PL/SQL, can not connect to the Oracle database, how to do? The method is: we can implement the connection by installing a 32-bit Oracle client.
Tools/Materials
PL/SQL Developer 9
32-bit Oracle Client
Method/Step
First, download the 32-bit Oracle client from the Web: Instantclient-basic-win32, unzip it after downloading to the local disk
Run PL/SQL Developer, do not enter user name, password, press "Cancel" to enter PL/SQL interface
Click "Tools"--"preferences"
In the Preferences window, enter the path of the Oracle client in the Oraclehome directory name , and enter the path to the Oci.dll in the OCI library
Desktop right-click on "Computer" and select "Properties"; In the System window, select "Advanced System Settings"
In System Properties, select Advanced--environment variables, create a new system variable, variable name: tns_admin, the variable value is the path to which the Tnsnames.ora file resides
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Run PL/SQL again, enter the user name and password to log in
Configuring Plsqldeveloper under Windows 8