create database link DB_EHR
connect to HDC_EHR

identified by HDC_EHR
using '192.168.20.138/orcl';



create or replace synonym XT_GYDM
for XT_GYDM@DB_EHR;




//手动输入DBLINK名，密码，数据库地址，需要同义词的表
create database link &dblink_ehr_name
connect to &PRO_EHR IDENTIFIED BY &PRO_PASSWD
using '&db_ehr_url';



create or replace synonym EHR_XT_YLFWJG
for PRO_EHR.XT_YLFWJG@&dblink_ehr_name;