解决plsql不能解析连接oracle，不能解析sid的问题

1、该问题问服务端的listener.ora文件中配置引起的添加了

添加了如下的一段就可以解析了：

(SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = d:\oracle\product\10.2.0\db_1) (SID_NAME = orcl) ) )

结论：原来的没有sid为orcl的，所以造成不能够解析。

造成原因尚不明了。

完整的配置如下：

# listener.ora Network Configuration File: d:\oracle\product\10.2.0\db_1\network\admin\listener.ora

# Generated by Oracle configuration tools.

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = d:\oracle\product\10.2.0\db_1) (PROGRAM = extproc) )

(SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = d:\oracle\product\10.2.0\db_1) (SID_NAME = orcl) ) )

LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) )