oracle function 获取拼音首字母

最新推荐文章于 2021-04-02 21:55:47 发布

转载最新推荐文章于 2021-04-02 21:55:47 发布 · 75 阅读

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原文链接：http://www.cnblogs.com/xuhj/p/4224260.html

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#数据库

本文介绍了一种将输入字符串中的字符按照特定规则映射为新的字符集的方法，包括拼音、普通字母、数字以及其他特殊字符的转换，并通过函数实现这一过程。

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CREATE OR REPLACE FUNCTION F_GET_PY_CAP(P_NAME IN VARCHAR2) RETURN VARCHAR2 AS
  V_WORD    VARCHAR2(10);
  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_WORD    := SUBSTR(P_NAME, I, 1);
    V_COMPARE := F_NLSSORT(V_WORD);
    IF V_COMPARE >= F_NLSSORT('a') AND V_COMPARE <= F_NLSSORT('z') THEN
      V_RETURN := V_RETURN || V_WORD;
    ELSIF V_COMPARE >= F_NLSSORT('A') AND V_COMPARE <= F_NLSSORT('Z') THEN
      V_RETURN := V_RETURN || V_WORD;
    ELSIF V_COMPARE >= F_NLSSORT('0') AND V_COMPARE <= F_NLSSORT('9') THEN
      V_RETURN := V_RETURN || V_WORD;
    ELSIF 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('发') 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
      V_RETURN := V_RETURN || SUBSTR(P_NAME, I, 1);
    END IF;
  END LOOP;
  RETURN UPPER(V_RETURN);
END;