获取中文字拼音的声母

CREATE function f_GetPy(@Str nvarchar(400))
returns nvarchar(4000)
as
begin
declare @strlen int,@re nvarchar(4000)
declare @t table(chr nchar(1) collate Chinese_PRC_CI_AS,letter nchar(1))
insert @t select '吖','A' union all select '八','B'
union all select '嚓','C' union all select '咑','D'
union all select '妸','E' union all select '发','F'
union all select '旮','G' union all select '铪','H'
union all select '丌','J' union all select '咔','K'
union all select '垃','L' union all select '嘸','M'
union all select '拏','N' union all select '噢','O'
union all select '妑','P' union all select '七','Q'
union all select '呥','R' union all select '仨','S'
union all select '他','T' union all select '屲','W'
union all select '夕','X' union all select '丫','Y'
union all select '帀','Z'

select @strlen=len(@str),@re=''
while @strlen>0
begin
select top 1 @re=letter+@re,@strlen=@strlen-1
from @t a where chr<=substring(@str,@strlen,1)
order by chr desc
if @@rowcount=0
select @re=substring(@str,@strlen,1)+@re,@strlen=@strlen-1
end
return(@re)
end
/*
--调用实现查询

1、select dbo.f_GetPy('你好') ---函数名前一定要加dbo.

2、select * from 表
where dbo.f_GetPy(字段) like 'L%'   --函数名前一定要加dbo.
*/