带你轻松接触Oracle DBLink的简单运用

2024-08-29 13:52:10

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在这个示例中，我们首先做了一个例子，目的是实现以上要求.

首先进行适当授权：

[Oracle@jumper oracle]$ sqlplus "/ as sysdba"SQL*Plus: Release 9.2.0.4.0 - PRoduction on Tue Nov 7 21:07:56 2006Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.Connected to:Oracle9i Enterprise Edition Release 9.2.0.4.0 - ProductionWith the Partitioning optionJServer Release 9.2.0.4.0 - ProductionSQL> grant create public database link to eygle;Grant succeeded.SQL> grant all on dbms_Flashback to eygle;Grant succeeded.

然后建立DB Link:

SQL> connect eygle/eygleConnected.SQL> create public database link hsbill using 'hsbill';Database link created.SQL> select db_link from dba_db_links;DB_LINK---------------------------------------------------HSBILLSQL> select * from dual@hsbill;D-X

在此之后我们可以尝试使用DB Link进行远程和本地执行:

SQL> set serveroutput on

SQL> set feedback off

SQL> declare

2 r_gname varchar2(40);

3 l_gname varchar2(40);

4 begin

5 execute immediate

6 'select GLOBAL_NAME from global_name@hsbill' into r_gname;

7 dbms_output.put_line('gname of remote:'||r_gname);

8 select GLOBAL_NAME into l_gname from global_name;

9 dbms_output.put_line('gname of locald:'||l_gname);

10 end;

11 /

gname of remote:HSBILL.HURRAY.COM.CN

gname of locald:EYGLE

远程Package或Function调用也可以随之实现:

SQL> declare2 r_scn number;3 l_scn number;4 begin5 execute immediate6 'select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER@hsbill from dual' into r_scn;7 dbms_output.put_line('scn of remote:'||r_scn);8 end;9 /scn of remote:18992092687SQL> -The End-

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