- Use below code to create DBLink , replace "oracleapexservices.com" & "connect to "TEST" identified by "1234"" with your own credentials and hostname
create database link "ANYNAME"
 connect to "TEST" identified by "1234"
 using '(DESCRIPTION =
 (ADDRESS_LIST =
 (ADDRESS = (PROTOCOL = TCP)(HOST = oracleapexservices.com)(PORT = 1521))
 )
 (CONNECT_DATA =
 (SERVICE_NAME = XEPDB1)
 )
 )'
/
