原文地址：http://bbs.zdnet.com.cn/thread-60379-1-4.html
php 里查询汉字的拼音首字母已经有很多参考的代码了。
现在给出在mysql 里实现的， 测试环境是mysql-5.0.27-win32
1、建立拼音首字母资料表
SQL代码
- DROP TABLE IF EXISTS `pyk`;
- CREATE TABLE `pyk` (
- `PY` varchar(1) ,
- `HZ1` int ,
- `HZ2` int
- ) ;
- INSERT INTO `pyk` (`PY`,`HZ1`,`HZ2`) VALUES
- ('A',-20319,-20284),
- ('B',-20283,-19776),
- ('C',-19775,-19219),
- ('D',-19218,-18711),
- ('E',-18710,-18527),
- ('F',-18526,-18240),
- ('G',-18239,-17923),
- ('I',-17922,-17418),
- ('J',-17417,-16475),
- ('K',-16474,-16213),
- ('L',-16212,-15641),
- ('M',-15640,-15166),
- ('N',-15165,-14923),
- ('O',-14922,-14915),
- ('P',-14914,-14631),
- ('Q',-14630,-14150),
- ('R',-14149,-14091),
- ('S',-14090,-13319),
- ('V',-13318,-12839),
- ('W',-12838,-12557),
- ('X',-12556,-11848),
- ('Y',-11847,-11056),
- ('Z',-11055,-10247);
2、建立mysql 函数
SQL代码
- DROP FUNCTION IF EXISTS hzcode;
- delimiter //
- CREATE FUNCTION hzcode (s CHAR(255)) RETURNS char
- BEGIN
- DECLARE hz_code int;
- DECLARE hz_py char;
- SET hz_code = ord(substring(s,1,1))*256+ord(substring(s,2,1))-65536 ;
- select py into hz_py from pyk where hz_code>=pyk.hz1 and hz_code<=pyk
- .hz2;
- RETURN hz_py;
- END
- //
- delimiter ;
3、先测试一下
XML/HTML代码
- mysql> select hzcode('南海龙王');
- +--------------------+
- | hzcode('南海龙王') |
- +--------------------+
- | N |
- +--------------------+
- 1 row in set (0.00 sec)
4、建立个测试表
SQL代码
- DROP TABLE IF EXISTS `f1`;
- create table f1 (
- name varchar(30),
- pykey varchar(1)
- );
- insert into f1(name) values
- ('张三'),
- ('李四'),
- ('王五'),
- ('赵六'),
- ('钱七');
5、测试
XML/HTML代码
- mysql> select * from f1;
- +------+-------+
- | name | pykey |
- +------+-------+
- | 张三 | NULL |
- | 李四 | NULL |
- | 王五 | NULL |
- | 赵六 | NULL |
- | 钱七 | NULL |
- +------+-------+
- 5 rows in set (0.00 sec)
- mysql> update f1 set pykey = hzcode(name);
- Query OK, 5 rows affected (0.05 sec)
- Rows matched: 5 Changed: 5 Warnings: 0
- mysql> select * from f1;
- +------+-------+
- | name | pykey |
- +------+-------+
- | 张三 | Z |
- | 李四 | L |
- | 王五 | W |
- | 赵六 | Z |
- | 钱七 | Q |
- +------+-------+
- 5 rows in set (0.00 sec)
这样就很方便地在MYSQL里查询汉字的首字母了。 类似地也可以直接在MYSQL得到汉字拼音。 不过需要拼音表，函数写法也不一样。
－－END－－
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