首先下載instantclient 可以到oracle官網下載，要注冊賬號，一定要下對應版本的，要不然不成功，
10G,11G版的,我已經傳上來了，免費下載:正在上傳中，稍等
配置文件tnsnames.ora 這個一個地方一般都放(network/ADMIN)，只有在pl/sql ----->tools-->proferences...------>connection----> oracle home(empty is autodetect) 寫上tnsnames.ora的路徑（相關路徑換成你自已的）
ORCL2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.100.183)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
設置環境變量（目錄換成你自已的）
TNS_ADMIN=D:\soft\oarcleclient\instantclient_11_2
NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK
path=D:\soft\oarcleclient\instantclient_11_2
