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oracle得到��语句

duduli — Thu, 22 Apr 2010 04:52:00 GMT

摘要: 得到数据库徏表语�?nbsp; 阅读全文

duduli 2010-04-22 12:52 发表评论

duduli — Thu, 22 Apr 2010 01:22:00 GMT

摘要: oracle 开启归档或非归档模�?nbsp; 阅读全文

duduli 2010-04-22 09:22 发表评论

duduli — Sun, 18 Apr 2010 01:58:00 GMT

1 select LPAD (Month, 20 - (20 - LENGTH (month)) / 2) month,
2           "Su",
3           "Mo",
4           "Tu",
5            "We",
6            "Th",
7            "Fr",
8            "Sa"
9       from (select TO_CHAR (dt, 'fmMonthfm YYYY') month,
10                   case
11                      when TO_CHAR (dt, 'fmMonthfm YYYY') like 'Dec%'
12                      and TO_CHAR (dt + 1, 'iw') = '01'
13                      then
14                         '53'
15                      when TO_CHAR (dt, 'fmMonthfm YYYY') like 'Jan%'
16                       and TO_CHAR (dt + 1, 'iw') = '53'
17                      then
18                         '.5'
19                      else
20                         TO_CHAR (dt + 1, 'iw')
21                   end
22                      week,
23                   MAX(DECODE (TO_CHAR (dt, 'd'),
24                               '1', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
25                      "Su",
26                  MAX(DECODE (TO_CHAR (dt, 'd'),
27                               '2', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
28                      "Mo",
29                   MAX(DECODE (TO_CHAR (dt, 'd'),
30                               '3', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
31                      "Tu",
32                   MAX(DECODE (TO_CHAR (dt, 'd'),
33                               '4', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
34                      "We",
35                   MAX(DECODE (TO_CHAR (dt, 'd'),
36                               '5', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
37                      "Th",
38                   MAX(DECODE (TO_CHAR (dt, 'd'),
39                               '6', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
40                      "Fr",
41                   MAX(DECODE (TO_CHAR (dt, 'd'),
42                               '7', LPAD (TO_CHAR (dt, 'fmdd'), 2)))
43                      "Sa"
44              from (select TRUNC (SYSDATE, 'y') - 1 + ROWNUM dt
45                      from all_objects
46                     where ROWNUM <=
47                              ADD_MONTHS (TRUNC (SYSDATE, 'y'), 12)
48                              - TRUNC (SYSDATE, 'y'))
49            group by TO_CHAR (dt, 'fmMonthfm YYYY'), TO_CHAR (dt + 1, 'iw')
50            order by TO_CHAR (dt + 1, 'iw'))
51    order by TO_DATE (month, 'Month YYYY'), TO_NUMBER (week)

duduli 2010-04-18 09:58 发表评论

duduli — Fri, 16 Apr 2010 07:40:00 GMT

本文通过一个最��单的oracle存储�q�程"proc_helloworld"的实验，展现一�? 存储�q�程的开发和�l�护�q�程�Q�适合��超��初学��牛(like me)�?/span>

1.�~�写。编写一个最最��单的存储�q�程�Q�给它�v个名字叫�? proc_helloworld
CREATE OR REPLACE PROCEDURE proc_helloworld
IS
BEGIN
   DBMS_OUTPUT.put_line ('Hello World!');
END;
/

2.创徏。在sqlplus命��o行界面创��存储�q�程
sys@ora10g> conn sec/sec
Connected.
sec@ora10g> CREATE OR REPLACE PROCEDURE proc_helloworld
2 IS
3 BEGIN
4     DBMS_OUTPUT.put_line ('Hello World!');
5 END;
6 /

Procedure created.

3.�q�行。两�U�方法运行存储过�E?/span>
1).需要在屏幕上显�C�出"DBMS_OUTPUT.put_line"的输出字�W�串�Q�需要做一个小��的讄��
sec@ora10g> show serveroutput
serveroutput OFF
sec@ora10g>set serveroutput on
sec@ora10g> show serveroutput
serveroutput ON SIZE 10000 FORMAT WORD_WRAPPED

2).在sqlplus命��o行界面��?EXECUTE"命��o�Q�简�? �?EXEC"�Q�执�?/span>
sec@ora10g>exec proc_helloworld
Hello World!

PL/SQL procedure successfully completed.

3).在一个无名PL/SQL块内�q�行存储�q�程
BEGIN
   proc_helloworld;
END;
/

sec@ora10g> BEGIN
2     proc_helloworld;
3 END;
4 /
Hello World!

PL/SQL procedure successfully completed.

4.修改。修改一个存储过�E�只需要将修改好的存储�q�程在sqlplus界面先重新执行一下即可，因�ؓ在创�� E�中使用的是"CREATE OR REPLACE PROCEDURE"�Q�也��是说如果没有就创徏�Q�如果已�l�存在了�q�个存储�q�程�Q�就替换�?/span>
CREATE OR REPLACE PROCEDURE proc_helloworld
IS
BEGIN
   DBMS_OUTPUT.put_line ('Hello World! '||chr(10)||'I am a Happy DBA Secooler!');
END;
/
或�?/span>
CREATE OR REPLACE PROCEDURE proc_helloworld
IS
BEGIN
   DBMS_OUTPUT.put_line ('Hello World!
I am a Happy DBA Secooler!');
END;
/

sec@ora10g> CREATE OR REPLACE PROCEDURE proc_helloworld
2 IS
3 BEGIN
4     DBMS_OUTPUT.put_line ('Hello World! '||chr(10)||'I am a Happy DBA Secooler!');
5 END;
6 /

Procedure created.

看一下执行效果：
sec@ora10g> exec proc_helloworld;
Hello World!
I am a Happy DBA Secooler!

PL/SQL procedure successfully completed.

5.调试。对于非常复杂的存储�q�程的调试是真正体现个�h��力和能力的地方�Q�往往需要很多的�l�验�Q�这个急不得，只能慢慢�?Take it easy.
在sqlplus下调试存储过�E�时�Q�如果出现错误，时刻使用"show errors"命��o查看哪里出错了，例如�Q?/span>
sec@ora10g> CREATE OR REPLACE PROCEDURE proc_helloworld
2 IS
3 BEGIN
4     DBMS_OUTPUT.put_line ('Hello World!');
5 END
6 /

Warning: Procedure created with compilation errors.

sec@ora10g> show errors
Errors for PROCEDURE PROC_HELLOWORLD:

LINE/COL ERROR
-------- -----------------------------------------------------------------
5/3      PLS-00103: Encountered the symbol "end-of-file" when expecting
         one of the following:
         ;
         delete exists prior SQL string>
         The symbol ";" was substituted for "end-of-file" to continue.

通过提示�Q�问题出现在END后面没有分号�l�束�W�号�Q�修改后问题得到处理
sec@ora10g> CREATE OR REPLACE PROCEDURE proc_helloworld
2 IS
3 BEGIN
4     DBMS_OUTPUT.put_line ('Hello World!');
5 END;
6 /

Procedure created.

6.删除。��用drop语句删除存储�q? �E?/span>
sec@ora10g> select object_name,object_type,status from user_objects where OBJECT_TYPE='PROCEDURE';

OBJECT_NAME                    OBJECT_TYPE         STATUS
------------------------------ ------------------- -------
PROC_HELLOWORLD                PROCEDURE           VALID

sec@ora10g>DROP PROCEDURE proc_helloworld;

Procedure dropped.

sec@ora10g> select object_name,object_type,status from user_objects where OBJECT_TYPE='PROCEDURE';

no rows selected

7.获取。在�l�护存储�q�程的过�E�中往往需要快速的获取存储�q�程的SQL创徏语句�Q�我�l�常使用的有如下两种�Ҏ��
1).使用DBMS_METADATA包获�?/span>
sec@ora10g>SELECT DBMS_METADATA.get_ddl ('PROCEDURE', 'PROC_HELLOWORLD') from dual;

DBMS_METADATA.GET_DDL('PROCEDURE','PROC_HELLOWORLD')
--------------------------------------------------------------------------------

CREATE OR REPLACE PROCEDURE "SEC"."PROC_HELLOWORLD"
IS
BEGIN
   DBMS_OUTPUT.put_line ('Hello World!');
END;

2).使用"USER_SOURCE" 视图获得�Q�本人推荐��用这�U�方法查看，格式标准�Q�内容也全面
sec@ora10g>SELECT text FROM user_source WHERE NAME = 'PROC_HELLOWORLD';

TEXT
------------------------------------------------------------------------------------------------------------------------------
PROCEDURE proc_helloworld
IS
BEGIN
   DBMS_OUTPUT.put_line ('Hello World!');
END;

8.��结
上面的实验，我通过�~�写、创建、运行、修攏V��调试、删除和获取七个内容描述了一个存储过�E�的开发和�l�护�q�程�?/span>
试验�Q�实验还有实践，技术工作者永�q�不变的途径�Q?/span>
Goodluck Friends!

-- The End --

duduli 2010-04-16 15:40 发表评论

最�q�想做DBA

duduli — Thu, 14 May 2009 12:10:00 GMT

摘要: 安装oracle�?
��查监视器: 监视器配�|�至��必��L��C?256 �U�颜�?
>>> 无法使用命��o /usr/openwin/bin/xdpyinfo 自动��查显�C�器颜色。请��查是否设 �|�了 DISPLAY 变量�? 未通过 <<<<
未通过某些要求��查。必��d��满��q�些要求,
然后才能�l�箋安装,那时��重新检查这些要求�?
是否�l�箋? (y/n) [n]

错误解决�Ҏ�� 阅读全文

duduli 2009-05-14 20:10 发表评论

duduli — Tue, 12 May 2009 02:31:00 GMT

摘要: oracle �?shut down 阅读全文

duduli 2009-05-12 10:31 发表评论

做个业余DBA�Q�一些书�c�推荐）

duduli — Mon, 11 May 2009 02:51:00 GMT

摘要: oracle dba 书籍下蝲阅读全文

duduli 2009-05-11 10:51 发表评论

oracle入门

duduli — Sun, 10 May 2009 01:50:00 GMT

什么是oracle server�Q?br /> oracle数据库服务器。服务器可以是一堆硬件和软�g的集合，也可以说是一堆��Y件�?br /> 而oracle服务器是一个数据管理系�l�，提供了管理信息�?br />
oracle server包含oracle instance�Q�oracle实例�Q�和oracle database�Q�oracle数据库）�?br />
oracle instance是干什么的�Q?br /> 它是提供讉K��oracle database的，一个instance只能讉K��一个database�Q�但是一个database可以被多个instance所讉K��?br />
instance包含什么�?br /> instance包含内存和后台进�E��?br />
connection & session
connection是客��L��与后台服务器�q�行�q�接�?br /> connection建立后与断开之间的通信��q��Z��个session�Q�也��是对话�Q�当connection断开后session也就�l�束�?br />
oracle database
oracle database��是一�D�|��据。包含三个种文�g�Q�data files�Q�数据文�Ӟ��Q�control files�Q�控制文�Ӟ��Q�redo log files�Q�重做日志）

oracle 文�g�c�d��?br /> 后缀为dbf的�ؓdata files文�g�Q�后�~�为ctl是control files文�g�Q�后�~�为log的是redo log filws�?br />
memory structure
分�ؓ2中内存块�Q�SGA�Q�system global area�Q�和PGA�Q�program global area�Q?br /> SGA�Q�一个instance一个SGA。在instance启动是分配，是instance的一部分。（主要消耗内存的�Q?br /> PGA�Q�一个server process一个PGA�Q?br />

linux�l�端启动oracle数据库：
sqlplus /nolog
执行命��o conn / as sysdba
startup
切换回终端用“�Q?#8221;
exit回到sqlplus�?br /> �l�端试试命��oipcs�Q�和sqlplus下��用show sga

duduli 2009-05-10 09:50 发表评论

亚洲另类图片另类电影,久久亚洲国产最新网站,国产亚洲人成在线影院

oracle得到�����语句

最�q�想做DBA

做个业余DBA�Q�一些书�c�推荐）

oracle入门

oracle得到��语句