获得汉字字符串的首字母(T-SQL函数)_sqlserver

/*–获得汉字字符串的首字母–*/
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)

http://www.gaodaima.com/36032.html获得汉字字符串的首字母(T-SQL函数)_sqlserver

as
begin–函数实现开始

 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–while循环开始
  select @ii=@ii+1,@n=63,@chn=substring(@str,@ii,1)
  
  if @chn>’z’–if开始
   –此处只有一个 select 语句，原理以“字符串排序以及ASCII码表”：
   select @n = @n +1,@c =    –★★★select★★★
    case chn –case开始
     when @chn then char(@n) –case分支
     else @c –case分支
     end –case结束
   from(  –★★★from★★★
   select top 27 * from (
   select chn = ‘吖’
   union all select ‘八’
   union all select ‘嚓’
   union all select ”
   union all select ”
   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 ‘`’
   union all select ”
   union all select ‘噢’
   union all select ‘r’
   union all select ‘七’
   union all select ”
   union all select ‘仨’
   union all select ‘他’
   union all select ” –no ‘u’
   union all select ” –no ‘v’
   union all select ”
   union all select ‘夕’
   union all select ‘丫’
   union all select ”
   union all select @chn) as a
   order by chn COLLATE Chinese_PRC_CI_AS
   ) as b  
  
  else –if对应的else 
   set @c=@chn 
  –if结束

  set @return=@return+@c
 end–while循环结束
 

 return(@return)
end–函数实现结束

go
–测试
select dbo.fgetpy(‘魏保光’) as 姓名拼音,dbo.fgetpy(‘ab中c国人’) as 中国人
select dbo.fgetpy(‘刘子良’) as 姓名拼音,dbo.fgetpy(‘ab中c国人’) as 中国人
select dbo.fgetpy(‘吴过’) as 姓名拼音,dbo.fgetpy(‘ab中c国人’) as 中国人
select dbo.fgetpy(‘东北’) as 姓名拼音,dbo.fgetpy(‘ab中c国人’) as 中国人
select dbo.fgetpy(‘王大海八丫’) as 王大海八丫,dbo.fgetpy(‘服盏D’) as 服盏D

–删除拼音函数
drop function fgetpy

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