一、问题描述

Oracle 报错 ora-12514。

二、解决方法

修改 tnsnames.ora，一般在 D:\oracle\product\10.2.0\client_1\NETWORK\ADMIN 目录下。将服务名 SERVICE_NAME 改为实际数据库 SID：
SERVICE_NAME = ORCL

# tnsnames.ora Network Configuration File: D:\oracle\product\10.2.0\client_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

HTOA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ORCL)
    )
  )