DATABASE LINK无法连接到远程数据库

Question

I am creating a two database A & BA can connect to B with database link but the problem is that, B can't connect to A. User name and password are all the same in both A and B

With message Error : ORA-12154: TNS:could not resolve the connect identifier specified

SYS_PRIV on A is

CREATE SESSION
CREATE PUBLIC DATABASE LINK
CREATE DATABASE LINK

and SYS_PRIV on B is

CREATE SESSION
CREATE PUBLIC DATABASE LINK
CREATE DATABASE LINK

is there any other privileges that I should check ? because I can make link to B but not vice versa.

Answer 1

Make sure the database name as you use it in the database link is available in the tnsnames.ora on your Oracle server. Because that's what the error message says.

ORA-12154: TNS:could not resolve the connect identifier specified

It cannot find the name you specified.