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关于Oracle过程,函数的经典例子及解析

2012-09-06 16:58 399 查看
一,Oracle中的过程,函数

对于oracle中的过程和函数,个人觉得可以化为一类,因为它们在写法上并没有什么的不同。公式无非就是

  create or replace Package_name(paramater1 in type,paramater2 in type,out_message out type)

  is

  locate_paramater1 type;

  locate_paramater2 type;

  begin

    begin

        select sth into locate_paramater1 from table_name where 。。。。

    exception

        when no_data_found then

         locate_paramater1:=' ';

        out_message:='Some Information to user to look';   

    end

    begin

        select sth into locate_paramater2 from table_name where 。。。。

    exception

        when no_data_found then

         locate_paramater2:=' ';

        out_message:='Some Information to user to look';   

    end

  end

总而言之,言而总之:包声明,私有数据神马的在紧跟is之后。接着就是一串的begin......exception....end;

  函数

  

  create or replace function_name(paramater1 in type,paramater2 in type)

  return return_type;

  is

  locate_paramater1 type;

  locate_paramater2 type;

  out_message return_type;

  begin

    begin

        select sth into locate_paramater1 from table_name where 。。。。

    exception

        when no_data_found then

           locate_paramater1:=' ';

          out_message:='Some Information to user to look';

          return  out_message;

        when others then

          out_message:='Error';

          return  out_message;

    end

    begin

        select sth into locate_paramater2 from table_name where 。。。。

    exception

        when no_data_found then

         locate_paramater2:=' ';

        out_message:='Some Information to user to look';

        return  out_message; 

    end
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