根据姓名拼音首字母快速查询

if exists (select * from sysobjects where id = object_id(N'[fn_ChineseToSpell]') and xtype in (N'FN', N'IF', N'TF'))
    drop function [fn_ChineseToSpell]
GO
/*创建取拼音首字母函数*/ 
create function [dbo].[fn_ChineseToSpell](@strChinese varchar(500)='') 
returns varchar(500) 
as 
begin /*函数实现开始*/ 
    declare @strLen int,@return varchar(500),@i int 
    declare @n int,@c char(1),@chn nchar(1)  
    select @strLen=len(@strChinese),@return='',@i=0 
    while @i<@strLen 
    begin /*while循环开始*/
            select @i=@i+1,@n=63,@chn=substring(@strChinese,@i,1) 
            if @chn>'z'/*原理:“字符串排序以及ASCII码表”*/                
                select @n = @n +1,@c =case chn when @chn then char(@n) else @c end from(select top 27 * from (select chn = '吖' union all select '八' union all select '嚓' union all select '咑' union all select '妸'  union all select '发'  union all select '旮'  union all select '铪'  union all select '丌' /*because have no 'i'*/ union all select '丌' union all select '咔' union all select '垃' union all select '嘸' union all select '拏' union all select '噢' union all select '妑' union all select '七' union all select '呥' union all select '仨' union all select '他' union all select '屲' /*no 'u'*/ union all select '屲' /*no 'v'*/ union all select '屲' union all select '夕' union all select '丫' union all select '帀' union all select @chn) as a  order by chn COLLATE Chinese_PRC_CI_AS ) as b  
            else
                set @c=@chn
            set @return=@return+@c  
    end /*while循环结束*/  
    return(@return)  
end /*函数实现结束*/
--使用方式：
select name from hanzi_pinyin where dbo.[fn_ChineseToSpell](name) LIKE 'Ys%'



--建表
create table hanzi_pinyin
(
    name nvarchar(50)
)
insert hanzi_pinyin values(N'殷路辉')
insert hanzi_pinyin values(N'杨涉')
insert hanzi_pinyin values(N'伊尹')
insert hanzi_pinyin values(N'张三')
insert hanzi_pinyin values(N'李四')
insert hanzi_pinyin values(N'王五')
insert hanzi_pinyin values(N'孙二')
insert hanzi_pinyin values(N'欧文')

(文章出处：http://www.cnblogs.com/sydeveloper)