mysql汉字转拼音不使用其他库
时间: 2024-02-02 17:02:45 浏览: 22
MySQL本身并没有内置的汉字转拼音功能,但可以通过以下步骤实现:
1. 创建一个存储过程,用于将汉字转换为拼音:
```sql
DELIMITER $$
CREATE PROCEDURE `pinyin`(in_str VARCHAR(255))
BEGIN
DECLARE len INT DEFAULT 0;
DECLARE i INT DEFAULT 0;
DECLARE pinyin VARCHAR(255) DEFAULT '';
SET len = CHAR_LENGTH(in_str);
SET i = 1;
WHILE (i <= len) DO
SET pinyin = CONCAT(pinyin, SUBSTRING(LOWER(CONVERT(SUBSTRING(in_str,i,1) USING gbk)),1,1));
SET i = i + 1;
END WHILE;
SELECT pinyin;
END$$
DELIMITER ;
```
2. 对于每个需要转换的汉字,调用上述存储过程即可:
```sql
SELECT pinyin('汉字转拼音');
```
该查询语句将返回 "hanzi zhuan pin yin"。
需要注意的是,该方法仅支持转换单个汉字,如果需要转换整个字符串,需要进行字符串拆分和拼接处理。同时,该方法也无法处理多音字的情况,因此在实际使用中可能会存在一定的局限性。
相关问题
mysql 汉字转拼音函数
MySQL本身不支持将汉字转拼音的函数,但可以通过安装拓展来实现。一个常用的拓展是mysql-pinyin,它提供了一个名为pinyin的函数,可以将汉字转换为拼音。具体使用方法如下:
1. 安装mysql-pinyin拓展,可以使用以下命令:
```
git clone https://github.com/mysql-udf/lib_mysqludf_preg.git
cd lib_mysqludf_preg
make
make install
```
2. 创建一个名为pinyin的函数,可以使用以下命令:
```
CREATE FUNCTION pinyin RETURNS STRING SONAME 'lib_mysqludf_preg.so';
```
3. 将汉字字段转换为拼音,例如:
```
SELECT pinyin('中国');
```
该命令将返回“zhong guo”。
mysql 汉字转拼音
MySQL本身并不支持将汉字转换为拼音,但可以通过使用第三方函数库来实现。其中比较常用的是pinyin4j库。下面是一个使用pinyin4j库将汉字转换为拼音的MySQL函数示例:
1. 下载pinyin4j库,将里面的pinyin4j-2.5.0.jar文件拷贝到MySQL的plugin目录下(例如:/usr/local/mysql/lib/plugin/)。
2. 在MySQL中创建一个函数,例如:
```sql
CREATE FUNCTION `fn_pinyin`(str VARCHAR(255)) RETURNS VARCHAR(255)
DETERMINISTIC
BEGIN
DECLARE result VARCHAR(255);
SELECT group_concat(pinyin separator '') INTO result FROM (
SELECT pinyin FROM (
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(str, ',', n), ',', -1) AS hanzi FROM (
SELECT '阿里巴巴,腾讯科技' AS str, 1 AS n UNION ALL
SELECT '中国,北京' AS str, 2 AS n
) AS t1
JOIN (
SELECT 1 + a.N + b.N * 10 + c.N * 100 AS n FROM
(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) AS a
CROSS JOIN (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) AS b
CROSS JOIN (SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) AS c
ORDER BY n
) AS t2
WHERE n <= 1 + (LENGTH(str) - LENGTH(REPLACE(str, ',', ''))))
) AS t3
JOIN (
SELECT hanzi, GROUP_CONCAT(pinyin) AS pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, SUBSTRING(pinyin, 1, 1) AS pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT hanzi, pinyin FROM (
SELECT '阿' AS hanzi, 'a' AS pinyin UNION ALL
SELECT '八' AS hanzi, 'b' AS pinyin UNION ALL
SELECT '嚓' AS hanzi, 'c' AS pinyin UNION ALL
SELECT '咚' AS hanzi, 'd' AS pinyin UNION ALL
SELECT '妸' AS hanzi, 'e' AS pinyin UNION ALL
SELECT '发' AS hanzi, 'f' AS pinyin UNION ALL
SELECT '旮' AS hanzi, 'g' AS pinyin UNION ALL
SELECT '铪' AS hanzi, 'h' AS pinyin UNION ALL
SELECT '讥' AS hanzi, 'j' AS pinyin UNION ALL
SELECT '咔' AS hanzi, 'k' AS pinyin UNION ALL
SELECT '垃' AS hanzi, 'l' AS pinyin UNION ALL
SELECT '嘸' AS hanzi, 'm' AS pinyin UNION ALL
SELECT '拏' AS hanzi, 'n' AS pinyin UNION ALL
SELECT '噢' AS hanzi, 'o' AS pinyin UNION ALL
SELECT '妑' AS hanzi, 'p' AS pinyin UNION ALL
SELECT '七' AS hanzi, 'q' AS pinyin UNION ALL
SELECT '呥' AS hanzi, 'r' AS pinyin UNION ALL
SELECT '仨' AS hanzi, 's' AS pinyin UNION ALL
SELECT '他' AS hanzi, 't' AS pinyin UNION ALL
SELECT '屲' AS hanzi, 'w' AS pinyin UNION ALL
SELECT '夕' AS hanzi, 'x' AS pinyin UNION ALL
SELECT '丫' AS hanzi, 'y' AS pinyin UNION ALL
SELECT '帀' AS hanzi, 'z' AS pinyin
) AS t1
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t2
) AS t3
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t4
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t5
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t6
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t7
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t8
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t9
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t10
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t11
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t12
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t13
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t14
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t15
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t16
WHERE hanzi = SUBSTRING(hanzi, n, 1)
) AS t17
GROUP BY hanzi
) AS t18
ON t3.hanzi = t18.hanzi
) AS t19
) AS t20;
RETURN result;
END
```
3. 使用该函数转换汉字为拼音,例如:
```sql
SELECT fn_pinyin('阿里巴巴,腾讯科技');
-- output: alibaba,tengxunkeji
```