sql 根據字母獲取以字母開頭的數據

函數1：

 ALTER Function [dbo].[Get_Str](@Str VARCHAR(100))
Returns VARCHAR(100)
as
BEGIN
 WHILE PATINDEX('%[^a-z]%',@Str) > 0
 BEGIN
  set @Str=stuff(@Str,patindex('%[^a-z]%',@Str),1,'')
 END
 RETURN @Str
END

函數2：

ALTER function [dbo].[fun_getPY](@str nvarchar(4000))
returns nvarchar(4000)
as
begin
declare @word nchar(1),@PY nvarchar(4000)
set @PY=''
while len(@str)>0
begin
set @word=left(@str,1)
--如果非漢字字符，返回原字符
set @PY=@PY+(case when unicode(@word) between 19968 and 19968+20901
then (select top 1 PY from (
select 'A' as PY,N'驁' as word
union all select 'B',N'簿'
union all select 'C',N'錯'
union all select 'D',N'鵽'
union all select 'E',N'樲'
union all select 'F',N'鰒'
union all select 'G',N'腂'
union all select 'H',N'夻'
union all select 'J',N'攈'
union all select 'K',N'穒'
union all select 'L',N'鱳'
union all select 'M',N'旀'
union all select 'N',N'桛'
union all select 'O',N'漚'
union all select 'P',N'曝'
union all select 'Q',N'囕'
union all select 'R',N'鶸'
union all select 'S',N'蜶'
union all select 'T',N'籜'
union all select 'W',N'鶩'
union all select 'X',N'鑂'
union all select 'Y',N'韻'
union all select 'Z',N'咗'
) T
where word>=@word collate Chinese_PRC_CS_AS_KS_WS
order by PY ASC) else @word end)
set @str=right(@str,len(@str)-1)
end
return DBO.Get_Str(@PY)
end

以上爲數據庫函數 提取英文過濾數字，和獲取獲取漢字首字母

調用方法爲：

 SELECT OrgName FROM 
 Organization_OrgInfo WHERE fun_getPY(OrgName) LIKE 'f%'