oracle實現將漢字字串轉換成拼音首字母縮寫

1、定義乙個函式：

create or replace function f_get_pyjm(p_name in varchar2) return varchar2 as

v_compare varchar2(100);
v_return varchar2(4000);
/*建立人：gangma2
功能描述：任意字串轉換成拼音首字元簡寫，返回拼音簡碼函 */
begin
declare
--定義乙個函式，通過nlssort來進行單個字元語言排序
function f_nlssort(p_word in varchar2) return varchar2 as
begin
return nlssort(p_word, 'nls_sort=schinese_pinyin_m');
end;
begin
for i in 1 .. length(p_name) loop
--通過迴圈取每個字元，進行比較，確定該字元首字母拼音
v_compare := f_nlssort(substr(p_name, i, 1));
if v_compare >= f_nlssort('吖') and v_compare <= f_nlssort('驁') then
v_return := v_return || 'a';
elsif v_compare >= f_nlssort('八') and v_compare <= f_nlssort('簿') then
v_return := v_return || 'b';
elsif v_compare >= f_nlssort('嚓') and v_compare <= f_nlssort('錯') then
v_return := v_return || 'c';
elsif v_compare >= f_nlssort('咑') and v_compare <= f_nlssort('鵽') then
v_return := v_return || 'd';
elsif v_compare >= f_nlssort('妸') and v_compare <= f_nlssort('樲') then
v_return := v_return || 'e';
elsif v_compare >= f_nlssort('發') and v_compare <= f_nlssort('猤') then
v_return := v_return || 'f';
elsif v_compare >= f_nlssort('旮') and v_compare <= f_nlssort('腂') then
v_return := v_return || 'g';
elsif v_compare >= f_nlssort('妎') and v_compare <= f_nlssort('夻') then
v_return := v_return || 'h';
elsif v_compare >= f_nlssort('丌') and v_compare <= f_nlssort('攈') then
v_return := v_return || 'j';
elsif v_compare >= f_nlssort('咔') and v_compare <= f_nlssort('穒') then
v_return := v_return || 'k';
elsif v_compare >= f_nlssort('垃') and v_compare <= f_nlssort('擽') then
v_return := v_return || 'l';
elsif v_compare >= f_nlssort('嘸') and v_compare <= f_nlssort('椧') then
v_return := v_return || 'm';
elsif v_compare >= f_nlssort('拏') and v_compare <= f_nlssort('瘧') then
v_return := v_return || 'n';
elsif v_compare >= f_nlssort('筽') and v_compare <= f_nlssort('漚') then
v_return := v_return || 'o';
elsif v_compare >= f_nlssort('妑') and v_compare <= f_nlssort('曝') then
v_return := v_return || 'p';
elsif v_compare >= f_nlssort('七') and v_compare <= f_nlssort('裠') then
v_return := v_return || 'q';
elsif v_compare >= f_nlssort('亽') and v_compare <= f_nlssort('鶸') then
v_return := v_return || 'r';
elsif v_compare >= f_nlssort('仨') and v_compare <= f_nlssort('蜶') then
v_return := v_return || 's';
elsif v_compare >= f_nlssort('侤') and v_compare <= f_nlssort('籜') then
v_return := v_return || 't';
elsif v_compare >= f_nlssort('屲') and v_compare <= f_nlssort('鶩') then
v_return := v_return || 'w';
elsif v_compare >= f_nlssort('夕') and v_compare <= f_nlssort('鑂') then
v_return := v_return || 'x';
elsif v_compare >= f_nlssort('丫') and v_compare <= f_nlssort('韻') then
v_return := v_return || 'y';
elsif v_compare >= f_nlssort('帀') and v_compare <= f_nlssort('咗') then
v_return := v_return || 'z';
else
--如果不能被轉換返回原字元
v_return := v_return || upper(substr(p_name, i, 1));
end if;
end loop;
return lower(v_return);
end;
end;

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