[英]Cannot connect with database link in Oracle
I have three Oracle databases connections (XE, XE_HR and XE_SBD_HR). 我有三个Oracle数据库连接(XE,XE_HR和XE_SBD_HR)。
I've tried to create private database link with fixed user that connects as HR using HR password with below query on XE_SBD_HR: 我试图用固定用户创建私有数据库链接,该用户使用HR密码以XE_SBD_HR上的以下查询作为HR连接:
CREATE DATABASE LINK DATABASE_LINK_1 CONNECT TO HR IDENTIFIED BY HR USING 'HR';
But now when I want to get data from table: 但是现在当我想从表中获取数据时:
SELECT * FROM COUNTRIES@DATABASE_LINK_1;
SQL Error: ORA-12154: TNS:could not resolve the connect identifier
I think this is caused by wrong database link connections because of this query response in XE_SBD_HR: 我认为这是由于XE_SBD_HR中的此查询响应而导致的数据库链接连接错误导致的:
COMMIT;
ALTER SESSION CLOSE DATABASE LINK DATABASE_LINK_1;
ORA-02081: database link is not open
How to fix that? 如何解决?
例如,如果在连接字符串中指定主机名,端口和服务名或Oracle SID,则可能会获得更大的成功
CREATE DATABASE LINK DATABASE_LINK_1 CONNECT TO HR IDENTIFIED BY HR USING 'localhost:1512/XE_SBD_HR';
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