41.排序规则在拼音处理中应用

--1. 按拼音排序
DECLARE @t TABLE(col varchar(2))
INSERT @t SELECT '中'
UNION ALL SELECT '国'
UNION ALL SELECT '人'

SELECT * FROM @t ORDER BY col COLLATE Chinese_PRC_CS_AS_KS_WS
/*--结果
col  
---- 
国
人
中
--*/
GO


/*==========================================*/


--2. 汉字首字母查询处理用户定义函数
CREATE FUNCTION f_GetPY(@str nvarchar(4000))
RETURNS nvarchar(4000)
AS
BEGIN
	DECLARE @py TABLE(
		ch char(1),
		hz1 nchar(1) COLLATE Chinese_PRC_CS_AS_KS_WS,
		hz2 nchar(1) COLLATE Chinese_PRC_CS_AS_KS_WS)
	INSERT @py SELECT 'A',N'吖',N'鏊'
	UNION  ALL SELECT 'B',N'八',N'簿'
	UNION  ALL SELECT 'C',N'嚓',N'错'
	UNION  ALL SELECT 'D',N'哒',N'跺'
	UNION  ALL SELECT 'E',N'屙',N'贰'
	UNION  ALL SELECT 'F',N'发',N'馥'
	UNION  ALL SELECT 'G',N'旮',N'过'
	UNION  ALL SELECT 'H',N'铪',N'蠖'
	UNION  ALL SELECT 'J',N'丌',N'竣'
	UNION  ALL SELECT 'K',N'咔',N'廓'
	UNION  ALL SELECT 'L',N'垃',N'雒'
	UNION  ALL SELECT 'M',N'妈',N'穆'
	UNION  ALL SELECT 'N',N'拿',N'糯'
	UNION  ALL SELECT 'O',N'噢',N'沤'
	UNION  ALL SELECT 'P',N'趴',N'曝'
	UNION  ALL SELECT 'Q',N'七',N'群'
	UNION  ALL SELECT 'R',N'蚺',N'箬'
	UNION  ALL SELECT 'S',N'仨',N'锁'
	UNION  ALL SELECT 'T',N'他',N'箨'
	UNION  ALL SELECT 'W',N'哇',N'鋈'
	UNION  ALL SELECT 'X',N'夕',N'蕈'
	UNION  ALL SELECT 'Y',N'丫',N'蕴'
	UNION  ALL SELECT 'Z',N'匝',N'做'
	DECLARE @i int
	SET @i=PATINDEX('%[吖-做]%' COLLATE Chinese_PRC_CS_AS_KS_WS,@str)
	WHILE @i>0
		SELECT @str=REPLACE(@str,SUBSTRING(@str,@i,1),ch)
			,@i=PATINDEX('%[吖-做]%' COLLATE Chinese_PRC_CS_AS_KS_WS,@str)
		FROM @py
		WHERE SUBSTRING(@str,@i,1) BETWEEN hz1 AND hz2
	RETURN(@str)
END
GO