How to connect to Oracle through PLSQL under Windows

Under this we learn how In Windows, by PL/SQL Developerconnecting the Oracle database.

My environment: Windows 10 Home Edition 64-bit
Oracle version: Oracle 11.2.0 64-bit
PLSQL version: PL / SQL Developer 10.0.3.1701 64-bit

Configure Oracle 32-bit client

First of all, in addition to the tools already above, we also install an Oracle client, but why do we install a 32-bit Oracle client here instead of a 64-bit Oracle client? The reason is that PLSQL Developer may not support connecting to 64-bit Oracle clients. Even for 64-bit systems, it is best to download and install 32-bit Oracle clients.

The Oracle 32-bit client is divided into a full version and a reduced version. The installation process of the Oracle 32-bit client full version is very similar to the installation process of the Oracle 64-bit server instantclient-basic-win32-11.2.0.1.0.zip. Installation requires only simple configuration, which is very convenient.

Download link: https://pan.baidu.com/s/1VNl0ynZPo3ZlGAupT8W8Lw
extraction code: fxyu

Step 1: The Lite client directly unpack, get instantclient_11_2folders, and place product catalog Oracle server installation path under (such D:\SoftWare\Oracle\Oracle11g\installation\product)

Thin client

Step 2: The Oracle server installation path tnsnames.ora, , listener.ora(e.g.,sqlnet.ora the path to the file in the computer is I: D:\SoftWare\Oracle\Oracle11g\installation\product\11.2.0\dbhome_1\NETWORK\ADMIN) file copy oriented at a step instantclient_11_2 directory.

tnsnames.ora

PLSQL connects to Oracle client

Open the PL / SQL Developer tool and come to the login interface.

PLSQL login interface

Click "Cancel" without logging in, and then you will enter the main interface as follows:

PLSQL main interface

Then select the top menu bar: Tools -> Preferences, set up Oracle Homeand OCI library. My configuration is as follows:

# 根据自己实际路径来配置
Oracle Home：D:\SoftWare\Oracle\Oracle11g\installation\product\instantclient_11_2
OCI library：D:\SoftWare\Oracle\Oracle11g\installation\product\instantclient_11_2\oci.dll

Oracle configuration

Configure system environment variables

After doing the above work, you need to simply configure the environment variables.

# 防止PLSQL出现中文乱码
变量名：NLS_LANG，变量值：SIMPLIFIED CHINESE_CHINA.ZHS16GBK

# 根据自己实际路径来设置
变量名：TNS_ADMIN
变量值：D:\SoftWare\Oracle\Oracle11g\installation\product\instantclient_11_2

After the above steps are completed, you can reopen PLSQL, and the login interface is as follows:

PLSQL login interface

Enter the user name and password to log in. The interface for successful login is as follows:

OK, here is the process of connecting PLSQL to Oracle client.