SQL汉字首字母查询处理用户定义函数

CREATE FUNCTION f_GetPY(@str nvarchar(4000))
RETURNS nvarchar(4000)
AS
BEGIN
DECLARE @py TABLE(
ch char(1),
hz1 nchar(1) COLLATE Chinese_PRC_CS_AS_KS_WS,
hz2 nchar(1) COLLATE Chinese_PRC_CS_AS_KS_WS)
INSERT @py SELECT 'A',N'吖',N'鏊'
UNION ALL SELECT 'B',N'八',N'簿'
UNION ALL SELECT 'C',N'嚓',N'错'
UNION ALL SELECT 'D',N'哒',N'跺'
UNION ALL SELECT 'E',N'屙',N'贰'
UNION ALL SELECT 'F',N'发',N'馥'
UNION ALL SELECT 'G',N'旮',N'过'
UNION ALL SELECT 'H',N'铪',N'蠖'
UNION ALL SELECT 'J',N'丌',N'竣'
UNION ALL SELECT 'K',N'咔',N'廓'
UNION ALL SELECT 'L',N'垃',N'雒'
UNION ALL SELECT 'M',N'妈',N'穆'
UNION ALL SELECT 'N',N'拿',N'糯'
UNION ALL SELECT 'O',N'噢',N'沤'
UNION ALL SELECT 'P',N'趴',N'曝'
UNION ALL SELECT 'Q',N'七',N'群'
UNION ALL SELECT 'R',N'蚺',N'箬'
UNION ALL SELECT 'S',N'仨',N'锁'
UNION ALL SELECT 'T',N'他',N'箨'
UNION ALL SELECT 'W',N'哇',N'鋈'
UNION ALL SELECT 'X',N'夕',N'蕈'
UNION ALL SELECT 'Y',N'丫',N'蕴'
UNION ALL SELECT 'Z',N'匝',N'做'

DECLARE @i int
SET @i=PATINDEX('%[吖-做]%' COLLATE Chinese_PRC_CS_AS_KS_WS,@str)
WHILE @i>0
SELECT @str=REPLACE(@str,SUBSTRING(@str,@i,1),ch)
,@i=PATINDEX('%[吖-做]%' COLLATE Chinese_PRC_CS_AS_KS_WS,@str)
FROM @py
WHERE SUBSTRING(@str,@i,1) BETWEEN hz1 AND hz2
RETURN(@str)

END
GO

然后，使用查询语句

select * from table where substring(dbo.f_GetPY(str),1,1) = 'A'

查出table表中str字段第一个字符的拼音首字母等于‘A’的所有数据

来自：http://blog.sina.com.cn/s/blog_407fb5bc01009ct7.html