通过输入汉字把汉字的头一个字母返回

create function fun_getPY(@str nvarchar(4000))returns nvarchar(4000)asbegindeclare @word nchar(1),@PY nvarchar(4000)set @PY=''while len(@str)>0beginset @word=left(@str,1)--如果非汉字字符，返回原字符set @PY=@PY+(case when unicode(@word) between 19968 and 19968+20901then (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)endreturn @PYendselect dbo.fun_getPY('李建波司的风景ASDF')--测试select * from (select 'a' as idunion all select '李'union all select 'C'union all select '表'union all select '王'union all select '黄') T order by dbo.fun_getPY(id)