Question

plsql developer不能连接oracle，出现12154 无法解析指定的连接标符？

使用cmd窗口和oracle自带的sqlplus可以连接数据库;
下面是tnsnames.ora中的类容：
# tnsnames.ora Network Configuration File: E:\develop\Oracle\app\Stapler\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORACLE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = ORACLE)
)
)

LISTENER_ORACLE =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

67 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.12.67)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = JTCRM)
)
)

ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)

247 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.1.247)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = JTCRM)
)
)

111 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.1.111)(PORT = 1521))
)
(CONNECT_DATA =
(SID = jtcrm)
)
)

Answer 1

数据库是本机的吗，还是服务器上的？

cmd窗口和oracle自带的sqlplus可以连接数据库，连接的时候使用 本地网络服务名了吗？

sqlplus user/pwd@orcl
还是
sqlplus user/pwd

是32位的系统还是64位的系统？

64位环境下，使用PL/SQL Developer连接Oracle：
•1. 下载32位Oracle InstantClient，并展开到某目录，例如C:\instantclient-basic-nt-11.2.0.2.0；
•2. 将系统的tnsnames.ora拷贝到该目录下；
•3. 在PLSQL Developer中设置Oracle_Home和OCI Library：
ToolsPreferencesOracleConnection：
Oracle_Home： C:\instantclient-basic-nt-11.2.0.2.0
OCI Library： C:\instantclient-basic-nt-11.2.0.2.0\oci.dll
•4. 在PLSQL Developer目录下新建如下bat文件，替换其快捷方式，启动PLSQL Developer：
@echo off
set path=C:\instantclient-basic-nt-11.2.0.2.0
set ORACLE_HOME=C:\instantclient-basic-nt-11.2.0.2.0
set TNS_ADMIN=C:\instantclient-basic-nt-11.2.0.2.0
set NLS_LANG=AMERICAN_AMERICA.ZHS16GBK
start plsqldev.exe

Answer 2

产生原因有2点：1、没有安装oralce-client 2、没有配置连接远程数据库的网络服务
解决如下：首先安装 oracle-client(主要是pl/sql 依赖于oracle-client),配置网络服务，主要是在oralce-client建立 与远程数据库的一个连接信息.