mysql 查詢漢字的全拼音以及查詢各個漢字的拼音首字母
阿新 • • 發佈：2018-11-06
查查詢漢字的全拼音
-- 建立漢字拼音對照臨時表
CREATE TABLE IF NOT EXISTS `t_base_pinyin` (
`pin_yin_` varchar(255) CHARACTER SET gbk NOT NULL,
`code_` int(11) NOT NULL,
PRIMARY KEY (`code_`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;- 1
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-- 插入資料
INSERT INTO t_base_pinyin (pin_yin_,code_) VALUES ("a" - 1
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-- 建立漢字轉換拼音函式
DROP FUNCTION IF EXISTS to_pinyin;
DELIMITER $
CREATE FUNCTION to_pinyin(NAME VARCHAR(255) CHARSET gbk)
RETURNS VARCHAR(255) CHARSET gbk
BEGIN
DECLARE mycode INT;
DECLARE tmp_lcode VARCHAR(2) CHARSET gbk;
DECLARE lcode INT;
DECLARE tmp_rcode VARCHAR(2) CHARSET gbk;
DECLARE rcode INT;
DECLARE mypy VARCHAR(255) CHARSET gbk DEFAULT '';
DECLARE lp INT;
SET mycode = 0;
SET lp = 1;
SET NAME = HEX(NAME);
WHILE lp < LENGTH(NAME) DO
SET tmp_lcode = SUBSTRING(NAME, lp, 2);
SET lcode = CAST(ASCII(UNHEX(tmp_lcode)) AS UNSIGNED);
SET tmp_rcode = SUBSTRING(NAME, lp + 2, 2);
SET rcode = CAST(ASCII(UNHEX(tmp_rcode)) AS UNSIGNED);
IF lcode > 128 THEN
SET mycode =65536 - lcode * 256 - rcode ;
SELECT CONCAT(mypy,pin_yin_) INTO mypy FROM t_base_pinyin WHERE CODE_ >= ABS(mycode) ORDER BY CODE_ ASC LIMIT 1;
SET lp = lp + 4;
ELSE
SET mypy = CONCAT(mypy,CHAR(CAST(ASCII(UNHEX(SUBSTRING(NAME, lp, 2))) AS UNSIGNED)));
SET lp = lp + 2;
END IF;
END WHILE;
RETURN LOWER(mypy);
END;
$
DELIMITER ;- 1
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測試
select name,UPPER(to_pinyin(name)) from school_test- 1
查詢各個漢字的拼音首字母
DROP FUNCTION IF EXISTS `getPY`;
DELIMITER ;;
CREATE FUNCTION `getPY`(in_string VARCHAR(65534)) RETURNS mediumtext CHARSET utf8
BEGIN
DECLARE tmp_str VARCHAR(65534) charset gbk DEFAULT '' ; #擷取字串，每次做擷取後的字串存放在該變數中，初始為函式引數in_string值
DECLARE tmp_len SMALLINT DEFAULT 0;#tmp_str的長度
DECLARE tmp_char VARCHAR(2) charset gbk DEFAULT '';#擷取字元，每次 left(tmp_str,1) 返回值存放在該變數中
DECLARE tmp_rs VARCHAR(65534) charset gbk DEFAULT '';#結果字串
DECLARE tmp_cc VARCHAR(2) charset gbk DEFAULT '';#拼音字元，存放單個漢字對應的拼音首字元
SET tmp_str = in_string;#初始化，將in_string賦給tmp_str
SET tmp_len = LENGTH(tmp_str);#初始化長度
WHILE tmp_len > 0 DO #如果被計算的tmp_str長度大於0則進入該while
SET tmp_char = LEFT(tmp_str,1);#獲取tmp_str最左端的首個字元，注意這裡是獲取首個字元，該字元可能是漢字，也可能不是。
SET tmp_cc = tmp_char;#左端首個字元賦值給拼音字元
IF LENGTH(tmp_char)>1 THEN#判斷左端首個字元是多位元組還是單位元組字元，要是多位元組則認為是漢字且作以下拼音獲取，要是單位元組則不處理。
SELECT ELT(INTERVAL(CONV(HEX(tmp_char),16,10),0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7,0xBFA6,0xC0AC
,0xC2E8,0xC4C3,0xC5B6,0xC5BE,0xC6DA,0xC8BB,0xC8F6,0xCBFA,0xCDDA ,0xCEF4,0xD1B9,0xD4D1),
'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z') INTO tmp_cc; #獲得漢字拼音首字元
END IF;
SET tmp_rs = CONCAT(tmp_rs,tmp_cc);#將當前tmp_str左端首個字元拼音首字元與返回字串拼接
SET tmp_str = SUBSTRING(tmp_str,2);#將tmp_str左端首字元去除
SET tmp_len = LENGTH(tmp_str);#計算當前字串長度
END WHILE;
RETURN tmp_rs;#返回結果字串
END;;
DELIMITER ;- 1
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測試
select name,getpy(name) from school_test- 1
