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前言

先贊后看，此生必賺！

每次安裝Oracle以后，都會出現使用plsql連接不上的問題！多次重啟電腦、重裝系統的磨人經歷之后，

今天看到這篇文章算是你我之幸！希望能幫助廣大技術人員減少一些時間，順利進行連接！

注：也可以用plsql連接遠程數據庫（只要有oracle的network\admin\tnsnames.ora就行）。

首先下載64位oracle以及32位輕量級客戶端(注意版本的對應，我用的是11g的oracle和11.2的客戶端)：

點擊進入oracle下載頁面點擊進入客戶端下載頁面

以下步驟請自行更改路徑，不然，出錯了別怪我哦：

oracle安裝到某路徑下，安裝步驟很簡單，網上可以搜到！

客戶端隨便解壓到一個路徑，我的是放在D:\app\shuhao\instantclient_11_2了。

然后把oracle中的D:\app\shuhao\product\11.2.0\dbhome_1里面的整個network文件夾復制，

粘貼到客戶端文件夾D:\app\shuhao\instantclient_11_2下面，如下圖所示：

PLSQL連接本地oracle或遠程oracle數據庫實現隨意切換功能

D:\app\shuhao\product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora文件內容，添加一個SID_DESC：

# listener.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = D:\app\shuhao\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:D:\app\shuhao\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
#下面的SID_DESC是新增加的內容，注意修改ORACLE_HOME路徑
(SID_DESC =
(SID_NAME = orcl)
(ORACLE_HOME = D:\app\shuhao\product\11.2.0\dbhome_1)
(GLOBAL_DBNAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)
ADR_BASE_LISTENER = D:\app\shuhao

D:\app\shuhao\product\11.2.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora文件內容，源文件沒有做改動：

# tnsnames.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

D:\app\shuhao\instantclient_11_2\network\admin\tnsnames.ora文件內容:

# tnsnames.ora Network Configuration File: D:\app\shuhao\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
#新增 @ 標識符，用于區分本地與遠程oracle
ORCL@192.168.0.164 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.164)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)