-- =============================================-- Create scalar function (NWGetPYFirst)-- =============================================IF EXISTS (SELECT * FROMsysobjects WHERE; name = N'NWGetPYFirst')DROP FUNCTION NWGetPYFirstGO
CREATE FUNCTION NWGetPYFirst(@str varchar(500) = '')RETURNS varchar(500)ASBEGINDeclare @strlen int, @return varchar(500), @ii int, @c char(1), @chn nchar(1)--//初始化变量 Declare @pytable table(chn char(2) COLLATE Chinese_PRC_CS_AS NOT NULL,py char(1) COLLATE Chinese_PRC_CS_AS NULL,PRIMARY KEY (chn) )insert into @pytable values('吖', 'A')insert into @pytable values('八', 'B')insert into @pytable values('嚓', 'C')insert into @pytable values('咑', 'D')insert into @pytable values('妸', 'E')insert into @pytable values('发', 'F')insert into @pytable values('旮', 'G')insert into @pytable values('铪', 'H')insert into @pytable values('丌', 'I')--insert into @pytable values('丌', 'J')insert into @pytable values('咔', 'K')insert into @pytable values('垃', 'L')insert into @pytable values('嘸', 'M')insert into @pytable values('拏', 'N')insert into @pytable values('噢', 'O')insert into @pytable values('妑', 'P')insert into @pytable values('七', 'Q')insert into @pytable values('呥', 'R')insert into @pytable values('仨', 'S')insert into @pytable values('他', 'T')insert into @pytable values('屲', 'U')--insert into @pytable values('屲', 'V')--insert into @pytable values('屲', 'W')insert into @pytable values('夕', 'X')insert into @pytable values('丫', 'Y')insert into @pytable values('帀', 'Z')
select @strlen = len(@str), @return = '', @ii = 0 --//循环整个字符串,用拼音的首字母替换汉字 while @ii < @strlen begin select @ii = @ii + 1, @chn = substring(@str, @ii, 1) if @chn > 'z' --//检索输入的字符串中有中文字符 SELECT @c = max(py) FROM @pytable where chn <= @chn else set @c=@chn set @return=@return+@c endreturn @returnENDGO
-- =============================================-- Example to execute function-- =============================================SELECT dbo.NWGetPYFirst('梦想国度'), dbo.NWGetPYFirst('noctwolf分享源码'), dbo.NWGetPYFirst('')GO
