Oracle更新某一个表的字段并生成相应的拼音助记码

  1、先实现拼音助记码的函数:

  CREATE OR REPLACE FUNCTION fgetpy (v_str VARCHAR2)

  RETURN VARCHAR2

  AS

  v_strlen INT;

  v_return VARCHAR2 (500);

  v_ii INT;

  v_n INT;

  v_c VARCHAR2 (2);

  v_chn VARCHAR2 (2);

  v_rc VARCHAR2 (500);

  /*************************************************************************

  生成汉字拼音码的函数。 wallimn 2009-06-21

  **************************************************************************/

  BEGIN

  --dbms_output.put_line(v_str);

  v_rc :=v_str;

  v_strlen :=LENGTH (v_rc);

  v_return :='';

  v_ii :=0;

  WHILE v_ii < v_strlen

  LOOP

  v_ii :=v_ii + 1;

  v_n :=63;

  SELECT SUBSTR (v_rc, v_ii, 1)

  INTO v_chn

  FROM DUAL;

  SELECT v_n + MAX (rowsf)

  INTO v_n

  FROM (SELECT chn, ROWNUM rowsf

  FROM (SELECT chn

  FROM (SELECT '吖' chn

  FROM DUAL

  UNION

  SELECT '八'

  FROM DUAL

  UNION ALL

  SELECT '嚓'

  FROM DUAL

  UNION ALL

  SELECT '咑'

  FROM DUAL

  UNION ALL

  SELECT '妸'

  FROM DUAL

  UNION ALL

  SELECT '发'

  FROM DUAL

  UNION ALL

  SELECT '旮'

  FROM DUAL

  UNION ALL

  SELECT '铪'

  FROM DUAL

  UNION ALL

  SELECT '丌'

  FROM DUAL --because have no 'i'

  UNION ALL

  SELECT '丌'

  FROM DUAL

  UNION ALL

  SELECT '咔'

  FROM DUAL

  UNION ALL

  SELECT '垃'

  FROM DUAL

  UNION ALL

  SELECT '嘸'

  FROM DUAL

  UNION ALL

  SELECT '拏'

  FROM DUAL

  UNION ALL

  SELECT '噢'

  FROM DUAL

  UNION ALL

  SELECT '妑'

  FROM DUAL

  UNION ALL

  SELECT '七'

  FROM DUAL

  UNION ALL

  SELECT '呥'

  FROM DUAL

  UNION ALL

  SELECT '仨'

  FROM DUAL

  UNION ALL

  SELECT '他'

  FROM DUAL

  UNION ALL

  SELECT '屲'

  FROM DUAL

  UNION ALL

  SELECT '屲'

  FROM DUAL

  UNION ALL

  SELECT '屲'

  FROM DUAL

  UNION ALL

  SELECT '夕'

  FROM DUAL

  UNION ALL

  SELECT '丫'

  FROM DUAL

  UNION ALL

  SELECT '帀'

  FROM DUAL

  UNION ALL

  SELECT v_chn

  FROM DUAL) a

  ORDER BY NLSSORT (chn, 'NLS_SORT=SCHINESE_PINYIN_M')) c) b

  WHERE chn=v_chn;

  v_c :=CHR (v_n);

  IF CHR (v_n)='@'

  THEN --英文直接返回

  v_c :=v_chn;

  END IF;

  v_return :=v_return || v_c;

  v_return :=lower(v_return);

  END LOOP;

  RETURN upper(v_return);

  END fgetpy;

  2、更新拼音助记码

  update TEST set A=FGETPY(需要生成拼音助记码的项目名称);

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