ORACLE获取汉子首字母

--这个函数在 ZHS16GBK字符集下编写
--一下在命令窗口执行，最好输入/会有建立成功 的提示


CREATE OR REPLACE FUNCTION F_PINYIN(P_NAME IN VARCHAR2) RETURN VARCHAR2 AS
V_COMPARE VARCHAR2(100);
V_RETURN VARCHAR2(4000);

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
V_COMPARE := F_NLSSORT(SUBSTR(P_NAME, I, 1));
IF V_COMPARE >= F_NLSSORT('吖 ') AND V_COMPARE <= F_NLSSORT('') 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('') THEN
V_RETURN := V_RETURN || 'C';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'D';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'E';
ELSIF V_COMPARE >= F_NLSSORT('发 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'F';
ELSIF V_COMPARE >= F_NLSSORT('旮 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'G';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'H';
ELSIF V_COMPARE >= F_NLSSORT('丌 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'J';
ELSIF V_COMPARE >= F_NLSSORT('咔 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'K';
ELSIF V_COMPARE >= F_NLSSORT('垃 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'L';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'M';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'N';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'O';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('曝') THEN
V_RETURN := V_RETURN || 'P';
ELSIF V_COMPARE >= F_NLSSORT('七 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'Q';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'R';
ELSIF V_COMPARE >= F_NLSSORT('仨 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'S';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'T';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'W';
ELSIF V_COMPARE >= F_NLSSORT('夕 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'X';
ELSIF V_COMPARE >= F_NLSSORT('丫 ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'Y';
ELSIF V_COMPARE >= F_NLSSORT(' ') AND V_COMPARE <= F_NLSSORT('') THEN
V_RETURN := V_RETURN || 'Z';
END IF;
END LOOP;
RETURN V_RETURN;
END;

--测试? SELECT F_PINYIN('函数已创建。 ') FROM DUAL;? 输出HSYCJ

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