Oracle跨库访问DBLINK使用以及实际应用

SELECT * FROM user_sys_privs WHERE PRIVILEGE LIKE UPPER('%DATABASE LINK%');

SELECT * FROM user_sys_privs WHERE PRIVILEGE LIKE UPPER('%UNLIMITED TABLESPACE%');

GRANT CREATE PUBLIC DATABASE LINK , DROP PUBLIC DATABASE LINK TO hxapp;

CREATE DATABASE LINK &dblink_name
CONNECT TO &db_name IDENTIFIED BY &db_passwd
USING '(DESCRIPTION = 
         (ADDRESS_LIST =
           (ADDRESS =
             (PROTOCOL = TCP)
             (HOST = &ip)
             (PORT = 1521)
           )
         )
         (CONNECT_DATA = (SERVICE_NAME = &sid)
         )
       )';
--例：
CREATE DATABASE LINK &dblink_name
CONNECT TO &db_name IDENTIFIED BY &db_password
USING '(DESCRIPTION = 
         (ADDRESS_LIST =
           (ADDRESS =
             (PROTOCOL = TCP)
             (HOST = 3.1.11.230)
             (PORT = 1521)
           )
         )
         (CONNECT_DATA = (SERVICE_NAME = cbsznckdb)
         )
       )';
--简写
	CREATE DATABASE LINK DBLINK_TEST_01
	  CONNECT TO hxapp IDENTIFIED BY hxapp
	  USING '3.1.11.230/cbsznckdb';

SELECT * FROM dba_db_links t;

SELECT * FROM user_db_links t;

 DROP PUBLIC DATABASE LINK &dblink_name;

 DROP DATABASE LINK &dblink_name;

--插入语句
INSERT INTO test_01@DBLINK_TEST_01 t
  SELECT 'UntifA' FROM dual;
--查询语句
SELECT * FROM test_01@DBLINK_TEST_01 t WHERE t.name = 'UntifA';
--删除语句
DELETE FROM test_01@DBLINK_TEST_01 t WHERE t.name = 'UntifA';
--更新语句
UPDATE test_01@DBLINK_TEST_01 t
   SET t.name = 'mengkiD~lufy'
 WHERE t.name = 'UntifA';