1.编写。编写一个最最简单的存储过程，给它起个名字叫做proc_helloworld
CREATE OR REPLACE PROCEDURE proc_helloworld
IS
BEGIN
DBMS_OUTPUT.put_line ('Hello World!');
END;
/
2.创建。在sqlplus命令行界面创建该存储过程
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.运行。两种方法运行存储过程
1).需要在屏幕上显示出"DBMS_OUTPUT.put_line"的输出字符串，需要做一个小小的设置
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命令行界面使用"EXECUTE"命令（简写做"EXEC"）执行
sec@ora10g> exec proc_helloworld
Hello World!
PL/SQL procedure successfully completed.
3).在一个无名PL/SQL块内运行存储过程
BEGIN
proc_helloworld;
END;
/
sec@ora10g> BEGIN
2 proc_helloworld;
3 END;
4 /
Hello World!
PL/SQL procedure successfully completed.
4.修改。修改一个存储过程只需要将修改好的存储过程在sqlplus界面先重新执行一下即可，因为在创建过程中使用的是"CREATE OR REPLACE PROCEDURE"，也就是说如果没有就创建，如果已经存在了这个存储过程，就替换它
CREATE OR REPLACE PROCEDURE proc_helloworld
IS
BEGIN
DBMS_OUTPUT.put_line ('Hello World! '||chr(10)||'I am a Happy DBA Secooler!');
END;
/
或者
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过程的调试是真正体现个人魅力和能力的地方，往往需要很多的经验，这个急不得，只能慢慢来 Take it easy.
在sqlplus下调试存储过程时，如果出现错误，时刻使用"show errors"命令查看哪里出错了，例如：
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:
; <an identifier> <a double-quoted delimited-identifier>
delete exists prior <a single-quoted SQL string>
The symbol ";" was substituted for "end-of-file" to continue.
通过提示，问题出现在END后面没有分号结束符号，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。使用drop语句删除存储过程
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。在维护存储过程的过程中往往需要快速的获取存储过程的SQL创建语句，我经常使用的有如下两种方法
1).使用DBMS_METADATA包获得
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，本人推荐使用这种方法查看，格式标准，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.小结
上面的实验，我通过编写、创建、运行、修改、调试、删除和获取七个内容描述了一个存储过程的开发和维护过程。
试验，实验还有实践，技术工作者永远不变的途径！
Goodluck Friends!
-- The End --
http://blog.itpub.net/519536/viewspace-571504
