获得汉字字符串的首字母.sql

SQL语言常用的一些命令各代码

获得汉字字符串的首字母
--转载(最早见于j9988的发表,具体原作者不明)--*/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[fGetPy]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[fGetPy]
GO

--创建取拼音函数
create function fGetPy(@Str varchar(500)='')
returns varchar(500)
as
begin
 declare @strlen int,@return varchar(500),@ii int
 declare @n int,@c char(1),@chn nchar(1)

 select @strlen=len(@str),@return='',@ii=0
 set @ii=0
 while @ii<@strlen
 begin
  select @ii=@ii+1,@n=63,@chn=substring(@str,@ii,1)   --若小写，则n赋值95
  if @chn>'z'
  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    --这里我改了一下，英文的字母保持不变
  set @return=@return+@c
 end
 return(@return)
end

go
--测试
select dbo.fgetpy('东莞市') as 东莞市,dbo.fgetpy('ab中c国人') as 中国人

--删除拼音函数
drop function fgetpy