参见戴明明的博客，oracle 根据汉字返回拼音函数，由于他的博客里没有提供完整的代码，研究了一个多小时，才弄出来；

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--------------Type Definition

CREATE OR REPLACE TYPE spell_code AS OBJECT
(

spell varchar2(10),
  code Varchar2(10)
);

-------------Create Table Type

CREATE OR REPLACE TYPE t_spellcode AS TABLE OF spell_code;

--------------字典函数：

create or replace function f_getSpellcode  return t_spellcode Pipelined

is

Begin

PIPE Row(spell_code('a', -20319));

PIPE Row(spell_code('ai', -20317));

PIPE Row(spell_code('an', -20304));

PIPE Row(spell_code('ang', -20295));

PIPE Row(spell_code('ao', -20292));

PIPE Row(spell_code('ba', -20283));

PIPE Row(spell_code('bai', -20265));

PIPE Row(spell_code('ban', -20257));

PIPE Row(spell_code('bang', -20242));

PIPE Row(spell_code('bao', -20230));

PIPE Row(spell_code('bei', -20051));

PIPE Row(spell_code('ben', -20036));

PIPE Row(spell_code('beng', -20032));

PIPE Row(spell_code('bi', -20026));

PIPE Row(spell_code('bian', -20002));

PIPE Row(spell_code('biao', -19990));

PIPE Row(spell_code('bie', -19986));

PIPE Row(spell_code('bin', -19982));

PIPE Row(spell_code('bing', -19976));

PIPE Row(spell_code('bo', -19805));

PIPE Row(spell_code('bu', -19784));

PIPE Row(spell_code('ca', -19775));

PIPE Row(spell_code('cai', -19774));

PIPE Row(spell_code('can', -19763));

PIPE Row(spell_code('cang', -19756));

PIPE Row(spell_code('cao', -19751));

PIPE Row(spell_code('ce', -19746));

PIPE Row(spell_code('ceng', -19741));

PIPE Row(spell_code('cha', -19739));

PIPE Row(spell_code('chai', -19728));

PIPE Row(spell_code('chan', -19725));

PIPE Row(spell_code('chang', -19715));

PIPE Row(spell_code('chao', -19540));

PIPE Row(spell_code('che', -19531));

PIPE Row(spell_code('chen', -19525));

PIPE Row(spell_code('cheng', -19515));

PIPE Row(spell_code('chi', -19500));

PIPE Row(spell_code('chong', -19484));

PIPE Row(spell_code('chou', -19479));

PIPE Row(spell_code('chu', -19467));

PIPE Row(spell_code('chuai', -19289));

PIPE Row(spell_code('chuan', -19288));

PIPE Row(spell_code('chuang', -19281));

PIPE Row(spell_code('chui', -19275));

PIPE Row(spell_code('chun', -19270));

PIPE Row(spell_code('chuo', -19263));

PIPE Row(spell_code('ci', -19261));

PIPE Row(spell_code('cong', -19249));

PIPE Row(spell_code('cou', -19243));

PIPE Row(spell_code('cu', -19242));

PIPE Row(spell_code('cuan', -19238));

PIPE Row(spell_code('cui', -19235));

PIPE Row(spell_code('cun', -19227));

PIPE Row(spell_code('cuo', -19224));

PIPE Row(spell_code('da', -19218));

PIPE Row(spell_code('dai', -19212));

PIPE Row(spell_code('dan', -19038));

PIPE Row(spell_code('dang', -19023));

PIPE Row(spell_code('dao', -19018));

PIPE Row(spell_code('de', -19006));

PIPE Row(spell_code('deng', -19003));

PIPE Row(spell_code('di', -18996));

PIPE Row(spell_code('dian', -18977));

PIPE Row(spell_code('diao', -18961));

PIPE Row(spell_code('die', -18952));

PIPE Row(spell_code('ding', -18783));

PIPE Row(spell_code('diu', -18774));

PIPE Row(spell_code('dong', -18773));

PIPE Row(spell_code('dou', -18763));

PIPE Row(spell_code('du', -18756));

PIPE Row(spell_code('duan', -18741));

PIPE Row(spell_code('dui', -18735));

PIPE Row(spell_code('dun', -18731));

PIPE Row(spell_code('duo', -18722));

PIPE Row(spell_code('e', -18710));

PIPE Row(spell_code('en', -18697));

PIPE Row(spell_code('er', -18696));

PIPE Row(spell_code('fa', -18526));

PIPE Row(spell_code('fan', -18518));

PIPE Row(spell_code('fang', -18501));

PIPE Row(spell_code('fei', -18490));

PIPE Row(spell_code('fen', -18478));

PIPE Row(spell_code('feng', -18463));

PIPE Row(spell_code('fo', -18448));

PIPE Row(spell_code('fou', -18447));

PIPE Row(spell_code('fu', -18446));

PIPE Row(spell_code('ga', -18239));

PIPE Row(spell_code('gai', -18237));

PIPE Row(spell_code('gan', -18231));

PIPE Row(spell_code('gang', -18220));

PIPE Row(spell_code('gao', -18211));

PIPE Row(spell_code('ge', -18201));

PIPE Row(spell_code('gei', -18184));

PIPE Row(spell_code('gen', -18183));

PIPE Row(spell_code('geng', -18181));

PIPE Row(spell_code('gong', -18012));

PIPE Row(spell_code('gou', -17997));

PIPE Row(spell_code('gu', -17988));

PIPE Row(spell_code('gua', -17970));

PIPE Row(spell_code('guai', -17964));

PIPE Row(spell_code('guan', -17961));

PIPE Row(spell_code('guang', -17950));

PIPE Row(spell_code('gui', -17947));

PIPE Row(spell_code('gun', -17931));

PIPE Row(spell_code('guo', -17928));

PIPE Row(spell_code('ha', -17922));

PIPE Row(spell_code('hai', -17759));

PIPE Row(spell_code('han', -17752));

PIPE Row(spell_code('hang', -17733));

PIPE Row(spell_code('hao', -17730));

PIPE Row(spell_code('he', -17721));

PIPE Row(spell_code('hei', -17703));

PIPE Row(spell_code('hen', -17701));

PIPE Row(spell_code('heng', -17697));

PIPE Row(spell_code('hong', -17692));

PIPE Row(spell_code('hou', -17683));

PIPE Row(spell_code('hu', -17676));

PIPE Row(spell_code('hua', -17496));

PIPE Row(spell_code('huai', -17487));

PIPE Row(spell_code('huan', -17482));

PIPE Row(spell_code('huang', -17468));

PIPE Row(spell_code('hui', -17454));

PIPE Row(spell_code('hun', -17433));

PIPE Row(spell_code('huo', -17427));

PIPE Row(spell_code('ji', -17417));

PIPE Row(spell_code('jia', -17202));

PIPE Row(spell_code('jian', -17185));

PIPE Row(spell_code('jiang', -16983));

PIPE Row(spell_code('jiao', -16970));

PIPE Row(spell_code('jie', -16942));

PIPE Row(spell_code('jin', -16915));

PIPE Row(spell_code('jing', -16733));

PIPE Row(spell_code('jiong', -16708));

PIPE Row(spell_code('jiu', -16706));

PIPE Row(spell_code('ju', -16689));

PIPE Row(spell_code('juan', -16664));

PIPE Row(spell_code('jue', -16657));

PIPE Row(spell_code('jun', -16647));

PIPE Row(spell_code('ka', -16474));

PIPE Row(spell_code('kai', -16470));

PIPE Row(spell_code('kan', -16465));

PIPE Row(spell_code('kang', -16459));

PIPE Row(spell_code('kao', -16452));

PIPE Row(spell_code('ke', -16448));

PIPE Row(spell_code('ken', -16433));

PIPE Row(spell_code('keng', -16429));

PIPE Row(spell_code('kong', -16427));

PIPE Row(spell_code('kou', -16423));

PIPE Row(spell_code('ku', -16419));

PIPE Row(spell_code('kua', -16412));

PIPE Row(spell_code('kuai', -16407));

PIPE Row(spell_code('kuan', -16403));

PIPE Row(spell_code('kuang', -16401));

PIPE Row(spell_code('kui', -16393));

PIPE Row(spell_code('kun', -16220));

PIPE Row(spell_code('kuo', -16216));

PIPE Row(spell_code('la', -16212));

PIPE Row(spell_code('lai', -16205));

PIPE Row(spell_code('lan', -16202));

PIPE Row(spell_code('lang', -16187));

PIPE Row(spell_code('lao', -16180));

PIPE Row(spell_code('le', -16171));

PIPE Row(spell_code('lei', -16169));

PIPE Row(spell_code('leng', -16158));

PIPE Row(spell_code('li', -16155));

PIPE Row(spell_code('lia', -15959));

PIPE Row(spell_code('lian', -15958));

PIPE Row(spell_code('liang', -15944));

PIPE Row(spell_code('liao', -15933));

PIPE Row(spell_code('lie', -15920));

PIPE Row(spell_code('lin', -15915));

PIPE Row(spell_code('ling', -15903));

PIPE Row(spell_code('liu', -15889));

PIPE Row(spell_code('long', -15878));

PIPE Row(spell_code('lou', -15707));

PIPE Row(spell_code('lu', -15701));

PIPE Row(spell_code('lv', -15681));

PIPE Row(spell_code('luan', -15667));

PIPE Row(spell_code('lue', -15661));

PIPE Row(spell_code('lun', -15659));

PIPE Row(spell_code('luo', -15652));

PIPE Row(spell_code('ma', -15640));

PIPE Row(spell_code('mai', -15631));

PIPE Row(spell_code('man', -15625));

PIPE Row(spell_code('mang', -15454));

PIPE Row(spell_code('mao', -15448));

PIPE Row(spell_code('me', -15436));

PIPE Row(spell_code('mei', -15435));

PIPE Row(spell_code('men', -15419));

PIPE Row(spell_code('meng', -15416));

PIPE Row(spell_code('mi', -15408));

PIPE Row(spell_code('mian', -15394));

PIPE Row(spell_code('miao', -15385));

PIPE Row(spell_code('mie', -15377));

PIPE Row(spell_code('min', -15375));

PIPE Row(spell_code('ming', -15369));

PIPE Row(spell_code('miu', -15363));

PIPE Row(spell_code('mo', -15362));

PIPE Row(spell_code('mou', -15183));

PIPE Row(spell_code('mu', -15180));

PIPE Row(spell_code('na', -15165));

PIPE Row(spell_code('nai', -15158));

PIPE Row(spell_code('nan', -15153));

PIPE Row(spell_code('nang', -15150));

PIPE Row(spell_code('nao', -15149));

PIPE Row(spell_code('ne', -15144));

PIPE Row(spell_code('nei', -15143));

PIPE Row(spell_code('nen', -15141));

PIPE Row(spell_code('neng', -15140));

PIPE Row(spell_code('ni', -15139));

PIPE Row(spell_code('nian', -15128));

PIPE Row(spell_code('niang', -15121));

PIPE Row(spell_code('niao', -15119));

PIPE Row(spell_code('nie', -15117));

PIPE Row(spell_code('nin', -15110));

PIPE Row(spell_code('ning', -15109));

PIPE Row(spell_code('niu', -14941));

PIPE Row(spell_code('nong', -14937));

PIPE Row(spell_code('nu', -14933));

PIPE Row(spell_code('nv', -14930));

PIPE Row(spell_code('nuan', -14929));

PIPE Row(spell_code('nue', -14928));

PIPE Row(spell_code('nuo', -14926));

PIPE Row(spell_code('o', -14922));

PIPE Row(spell_code('ou', -14921));

PIPE Row(spell_code('pa', -14914));

PIPE Row(spell_code('pai', -14908));

PIPE Row(spell_code('pan', -14902));

PIPE Row(spell_code('pang', -14894));

PIPE Row(spell_code('pao', -14889));

PIPE Row(spell_code('pei', -14882));

PIPE Row(spell_code('pen', -14873));

PIPE Row(spell_code('peng', -14871));

PIPE Row(spell_code('pi', -14857));

PIPE Row(spell_code('pian', -14678));

PIPE Row(spell_code('piao', -14674));

PIPE Row(spell_code('pie', -14670));

PIPE Row(spell_code('pin', -14668));

PIPE Row(spell_code('ping', -14663));

PIPE Row(spell_code('po', -14654));

PIPE Row(spell_code('pu', -14645));

PIPE Row(spell_code('qi', -14630));

PIPE Row(spell_code('qia', -14594));

PIPE Row(spell_code('qian', -14429));

PIPE Row(spell_code('qiang', -14407));

PIPE Row(spell_code('qiao', -14399));

PIPE Row(spell_code('qie', -14384));

PIPE Row(spell_code('qin', -14379));

PIPE Row(spell_code('qing', -14368));

PIPE Row(spell_code('qiong', -14355));

PIPE Row(spell_code('qiu', -14353));

PIPE Row(spell_code('qu', -14345));

PIPE Row(spell_code('quan', -14170));

PIPE Row(spell_code('que', -14159));

PIPE Row(spell_code('qun', -14151));

PIPE Row(spell_code('ran', -14149));

PIPE Row(spell_code('rang', -14145));

PIPE Row(spell_code('rao', -14140));

PIPE Row(spell_code('re', -14137));

PIPE Row(spell_code('ren', -14135));

PIPE Row(spell_code('reng', -14125));

PIPE Row(spell_code('ri', -14123));

PIPE Row(spell_code('rong', -14122));

PIPE Row(spell_code('rou', -14112));

PIPE Row(spell_code('ru', -14109));

PIPE Row(spell_code('ruan', -14099));

PIPE Row(spell_code('rui', -14097));

PIPE Row(spell_code('run', -14094));

PIPE Row(spell_code('ruo', -14092));

PIPE Row(spell_code('sa', -14090));

PIPE Row(spell_code('sai', -14087));

PIPE Row(spell_code('san', -14083));

PIPE Row(spell_code('sang', -13917));

PIPE Row(spell_code('sao', -13914));

PIPE Row(spell_code('se', -13910));

PIPE Row(spell_code('sen', -13907));

PIPE Row(spell_code('seng', -13906));

PIPE Row(spell_code('sha', -13905));

PIPE Row(spell_code('shai', -13896));

PIPE Row(spell_code('shan', -13894));

PIPE Row(spell_code('shang', -13878));

PIPE Row(spell_code('shao', -13870));

PIPE Row(spell_code('she', -13859));

PIPE Row(spell_code('shen', -13847));

PIPE Row(spell_code('sheng', -13831));

PIPE Row(spell_code('shi', -13658));

PIPE Row(spell_code('shou', -13611));

PIPE Row(spell_code('shu', -13601));

PIPE Row(spell_code('shua', -13406));

PIPE Row(spell_code('shuai', -13404));

PIPE Row(spell_code('shuan', -13400));

PIPE Row(spell_code('shuang', -13398));

PIPE Row(spell_code('shui', -13395));

PIPE Row(spell_code('shun', -13391));

PIPE Row(spell_code('shuo', -13387));

PIPE Row(spell_code('si', -13383));

PIPE Row(spell_code('song', -13367));

PIPE Row(spell_code('sou', -13359));

PIPE Row(spell_code('su', -13356));

PIPE Row(spell_code('suan', -13343));

PIPE Row(spell_code('sui', -13340));

PIPE Row(spell_code('sun', -13329));

PIPE Row(spell_code('suo', -13326));

PIPE Row(spell_code('ta', -13318));

PIPE Row(spell_code('tai', -13147));

PIPE Row(spell_code('tan', -13138));

PIPE Row(spell_code('tang', -13120));

PIPE Row(spell_code('tao', -13107));

PIPE Row(spell_code('te', -13096));

PIPE Row(spell_code('teng', -13095));

PIPE Row(spell_code('ti', -13091));

PIPE Row(spell_code('tian', -13076));

PIPE Row(spell_code('tiao', -13068));

PIPE Row(spell_code('tie', -13063));

PIPE Row(spell_code('ting', -13060));

PIPE Row(spell_code('tong', -12888));

PIPE Row(spell_code('tou', -12875));

PIPE Row(spell_code('tu', -12871));

PIPE Row(spell_code('tuan', -12860));

PIPE Row(spell_code('tui', -12858));

PIPE Row(spell_code('tun', -12852));

PIPE Row(spell_code('tuo', -12849));

PIPE Row(spell_code('wa', -12838));

PIPE Row(spell_code('wai', -12831));

PIPE Row(spell_code('wan', -12829));

PIPE Row(spell_code('wang', -12812));

PIPE Row(spell_code('wei', -12802));

PIPE Row(spell_code('wen', -12607));

PIPE Row(spell_code('weng', -12597));

PIPE Row(spell_code('wo', -12594));

PIPE Row(spell_code('wu', -12585));

PIPE Row(spell_code('xi', -12556));

PIPE Row(spell_code('xia', -12359));

PIPE Row(spell_code('xian', -12346));

PIPE Row(spell_code('xiang', -12320));

PIPE Row(spell_code('xiao', -12300));

PIPE Row(spell_code('xie', -12120));

PIPE Row(spell_code('xin', -12099));

PIPE Row(spell_code('xing', -12089));

PIPE Row(spell_code('xiong', -12074));

PIPE Row(spell_code('xiu', -12067));

PIPE Row(spell_code('xu', -12058));

PIPE Row(spell_code('xuan', -12039));

PIPE Row(spell_code('xue', -11867));

PIPE Row(spell_code('xun', -11861));

PIPE Row(spell_code('ya', -11847));

PIPE Row(spell_code('yan', -11831));

PIPE Row(spell_code('yang', -11798));

PIPE Row(spell_code('yao', -11781));

PIPE Row(spell_code('ye', -11604));

PIPE Row(spell_code('yi', -11589));

PIPE Row(spell_code('yin', -11536));

PIPE Row(spell_code('ying', -11358));

PIPE Row(spell_code('yo', -11340));

PIPE Row(spell_code('yong', -11339));

PIPE Row(spell_code('you', -11324));

PIPE Row(spell_code('yu', -11303));

PIPE Row(spell_code('yuan', -11097));

PIPE Row(spell_code('yue', -11077));

PIPE Row(spell_code('yun', -11067));

PIPE Row(spell_code('za', -11055));

PIPE Row(spell_code('zai', -11052));

PIPE Row(spell_code('zan', -11045));

PIPE Row(spell_code('zang', -11041));

PIPE Row(spell_code('zao', -11038));

PIPE Row(spell_code('ze', -11024));

PIPE Row(spell_code('zei', -11020));

PIPE Row(spell_code('zen', -11019));

PIPE Row(spell_code('zeng', -11018));

PIPE Row(spell_code('zha', -11014));

PIPE Row(spell_code('zhai', -10838));

PIPE Row(spell_code('zhan', -10832));

PIPE Row(spell_code('zhang', -10815));

PIPE Row(spell_code('zhao', -10800));

PIPE Row(spell_code('zhe', -10790));

PIPE Row(spell_code('zhen', -10780));

PIPE Row(spell_code('zheng', -10764));

PIPE Row(spell_code('zhi', -10587));

PIPE Row(spell_code('zhong', -10544));

PIPE Row(spell_code('zhou', -10533));

PIPE Row(spell_code('zhu', -10519));

PIPE Row(spell_code('zhua', -10331));

PIPE Row(spell_code('zhuai', -10329));

PIPE Row(spell_code('zhuan', -10328));

PIPE Row(spell_code('zhuang', -10322));

PIPE Row(spell_code('zhui', -10315));

PIPE Row(spell_code('zhun', -10309));

PIPE Row(spell_code('zhuo', -10307));

PIPE Row(spell_code('zi', -10296));

PIPE Row(spell_code('zong', -10281));

PIPE Row(spell_code('zou', -10274));

PIPE Row(spell_code('zu', -10270));

PIPE Row(spell_code('zuan', -10262));

PIPE Row(spell_code('zui', -10260));

PIPE Row(spell_code('zun', -10256));

PIPE Row(spell_code('zuo', -10254));

Return;

end;

--------------- 返回函数， 该函数会调用上面的字典函数

create or replace function f_getSpell(p_cnStr In varchar2,

p_sign  In number Default Null)

return varchar2 as

lv_spell varchar2(200);

lv_temp  Varchar2(10);

lv_char  varchar2(10);

lv_bytes varchar2(100);

li_bytes Integer;

li_pos   Integer;

begin

if p_cnStr is null then

return '';

end if;

for i In 1 .. length(p_cnStr) loop

lv_char := substr(p_cnStr, i, 1);

if lengthb(lv_char) = 1 then

lv_spell := lv_spell || lv_char;

elsif lengthb(lv_char) = 2 then

Select
replace(substrb(dump(lv_char,1010),instrb(dump(lv_char,1010),'ZHS16GBK:')),'ZHS16GBK:
','') Into lv_bytes from dual;

li_pos:=instr(lv_bytes,',');

li_bytes:=substr(lv_bytes,1,li_pos-1)*256+substr(lv_bytes,li_pos+1)-256*256;

Select ascii(lv_char) - 256 * 256 Into li_bytes From dual;

If (li_bytes < -20319 Or li_bytes > -10247) Then

lv_spell := lv_spell || '*';

Else

select max(spell)

Into lv_temp

from table(f_getSpellcode)

where code <= li_bytes;

if p_sign Is Null then

lv_spell := lv_spell || substr(lv_temp, 1, 1);

else

lv_spell := lv_spell || lv_temp;

end if;

End If;

elsif lengthb(lv_char) = 3 then

Select replace(substrb(dump(convert(lv_char, 'ZHS16GBK', 'UTF8'),

1010),

instrb(dump(convert(lv_char, 'ZHS16GBK', 'UTF8'),

1010),

'UTF8:')),

'UTF8: ',

'')

Into lv_bytes

from dual;

li_pos   := instr(lv_bytes, ',');

li_bytes := substr(lv_bytes, 1, li_pos - 1) * 256 +

substr(lv_bytes, li_pos + 1) - 256 * 256;

If (li_bytes < -20319 Or li_bytes > -10247) Then

lv_spell := lv_spell || '*';

Else

select max(spell)

Into lv_temp

from table(f_getSpellcode)

where code <= li_bytes;

if p_sign Is Null then

lv_spell := lv_spell || substr(lv_temp, 1, 1);

else

lv_spell := lv_spell || lv_temp;

end if;

End If;

end if;

end loop;

return lv_spell;

end;

--------------示例：

SQL> select f_getspell('安徽理工大学') from dual;

F_GETSPELL('安徽理工大学')
------------------------------------------------------------------------------

ahlgdx

SQL> select f_getspell('安徽理工大学',1) from dual;

F_GETSPELL('安徽理工大学',1)
----------------------------------------------------------------------------

anhuiligongdaxue

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