plsql小写金额转大写金额函数

create or replace function comm.F_upper_money(p_num in number default null)

  return nvarchar2 is

  /*Ver:1.0 Created By xsb on 2003-8-18 For:

  将金额数字(单位元)转换为大写(采用从低至高算法)

  数字整数部分不得超过16位,可以是负数。

  Ver：1.1 Modified By xsb on 2003-8-20 For:个位数处理也放在For循环中。

  Ver：1.2 Modified By xsb on 2003-8-22 For:分后不带整字。

  Ver：1.3 Modified By xsb on 2003-8-28 For:完善测试用例。

  测试用例:

  SET HEAD OFF

  SET FEED OFF

  select '无参数时='||f_upper_money() from dual;

  select 'null='||f_upper_money(null) from dual;

  select '0='||f_upper_money(0) from dual;

  select '0.01='||f_upper_money(0.01) from dual;

  select '0.126='||f_upper_money(0.126) from dual;

  select '01.234='||f_upper_money(01.234) from dual;

  select '10='||f_upper_money(10) from dual;

  select '100.1='||f_upper_money(100.1) from dual;

  select '100.01='||f_upper_money(100.01) from dual;

  select '10000='||f_upper_money(10000) from dual;

  select '10012.12='||f_upper_money(10012.12) from dual;

  select '20000020.01='||f_upper_money(20000020.01) from dual;

  select '3040506708.901='||f_upper_money(3040506708.901) from dual;

  select '40005006078.001='||f_upper_money(40005006078.001) from dual;

  select '-123456789.98='||f_upper_money(-123456789.98) from dual;

  select '123456789123456789.89='||f_upper_money(123456789123456789.89) from dual;

  */

  Result nvarchar2(100); --返回字符串

  num_round nvarchar2(100) := to_char(abs(round(p_num, 2))); --转换数字为小数点后2位的字符(正数)

  num_left nvarchar2(100); --小数点左边的数字

  num_right nvarchar2(2); --小数点右边的数字

  str1 nchar(10) := '零壹贰叁肆伍陆柒捌玖'; --数字大写

  str2 nchar(16) := '元拾佰仟万拾佰仟亿拾佰仟万拾佰仟'; --数字位数(从低至高)

  num_pre number(1) := 1; --前一位上的数字

  num_current number(1); --当前位上的数字

  num_count number := 0; --当前数字位数

begin

  if p_num is null then

    return null;

  end if; --转换数字为null时返回null

  select to_char(nvl(substr(to_char(num_round),

                            1,

                            decode(instr(to_char(num_round), '.'),

                                   0,

                                   length(num_round),

                                   instr(to_char(num_round), '.') - 1)),

                     0))

    into num_left

    from dual; --取得小数点左边的数字

  select substr(to_char(num_round),

                decode(instr(to_char(num_round), '.'),

                       0,

                       length(num_round) + 1,

                       instr(to_char(num_round), '.') + 1),

                2)

    into num_right

    from dual; --取得小数点右边的数字

  if length(num_left) > 16 then

    return '**********';

  end if; --数字整数部分超过16位时

  --采用从低至高的算法，先处理小数点右边的数字

  if length(num_right) = 2 then

    if to_number(substr(num_right, 1, 1)) = 0 then

      result := '零' ||

                substr(str1, to_number(substr(num_right, 2, 1)) + 1, 1) || '分';

    else

      result := substr(str1, to_number(substr(num_right, 1, 1)) + 1, 1) || '角' ||

                substr(str1, to_number(substr(num_right, 2, 1)) + 1, 1) || '分';

    end if;

  elsif length(num_right) = 1 then

    result := substr(str1, to_number(substr(num_right, 1, 1)) + 1, 1) || '角整';

  else

    result := '整';

  end if;

  --再处理小数点左边的数字

  for i in reverse 1 .. length(num_left) loop

    --(从低至高)

    num_count := num_count + 1; --当前数字位数

    num_current := to_number(substr(num_left, i, 1)); --当前位上的数字

    if num_current > 0 then

      --当前位上数字不为0按正常处理

      result := substr(str1, num_current + 1, 1) ||

                substr(str2, num_count, 1) || result;

    else

      --当前位上数字为0时

      if mod(num_count - 1, 4) = 0 then

        --当前位是元、万或亿时

        result := substr(str2, num_count, 1) || result;

        num_pre := 0; --元、万,亿前不准加零

      end if;

      if num_pre > 0 or length(num_left) = 1 then

        --上一位数字不为0或只有个位时

        result := substr(str1, num_current + 1, 1) || result;

      end if;

    end if;

    num_pre := num_current;

  end loop;

  if p_num < 0 then

    --转换数字是负数时

    result := '负' || result;

  end if;

  return Result;

exception

  when others then

    raise_application_error(-20001, '数字转换大写出现错误！' || sqlerrm);

end;