Database link小结一下

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在Pl/SQL里想从一个数据库里连接到另一个数据库,要靠Database link.例子如下:

sql 代码

DROP DATABASE LINK elinkDB_copy;
CREATE DATABASE LINK elinkDB_copy
  CONNECT TO nims IDENTIFIED BY nims
  USING '(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = dev.elinksoft.com)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = elinkdb)
    )
  )';
INSERT INTO T_DEPARTMENT_DEFINE
            (DEPARTMENT_CODE, INTERNAL_DEPARTMENT_CODE,
             DEPARTMENT_CHINESE_NAME, DEPARTMENT_ABBR_NAME, DEPARTMENT_LEVEL,
             FOUND_DATE, CHINESE_ADDRESS, POSTCODE, TELEPHONE,
             UPPER_DEPARTMENT_CODE, LINK_MAN_CODE, TELE_AREA_CODE,
             LEVEL_DEP_CODE, FCD, FCU, LCD, LCU)
   (SELECT DEPARTMENT_CODE, INTERNAL_DEPARTMENT_CODE, DEPARTMENT_CHINESE_NAME,
           DEPARTMENT_ABBR_NAME, DEPARTMENT_LEVEL, FOUND_DATE,
           CHINESE_ADDRESS, POSTCODE, TELEPHONE, UPPER_DEPARTMENT_CODE,
           LINK_MAN_CODE, TELE_AREA_CODE, LEVEL_DEP_CODE, FCD, FCU, LCD, LCU
      FROM T_DEPARTMENT_DEFINE@elinkDB_copy);
commit;
ALTER SESSION CLOSE DATABASE LINK elinkDB_copy;

另外,如果是同一个数据下的不同用户,可以用视图.