SQL 表值函数操作

CREATE FUNCTION [dbo].[f_getpy_tb] ( @str VARCHAR(100) )
RETURNS @tb TABLE ( re VARCHAR(8000) )
AS 
    BEGIN
        DECLARE @re TABLE ( id INT, re VARCHAR(8000) )  --数据处理中间表

        DECLARE @i INT ,
            @ilen INT ,
            @splitchr VARCHAR(1)
        SELECT  @splitchr = ' ' --两个拼音之间的分隔符(目的是为了通用性考虑)
                ,
                @i = 1 ,
                @ilen = LEN(@str)

        INSERT  INTO @re
                SELECT  @i ,
                        py
                FROM    YingShe
                WHERE   chr = SUBSTRING(@str, @i, 1)
        WHILE @i < @ilen 
            BEGIN
                SET @i = @i + 1
                INSERT  INTO @re
                        SELECT  @i ,
                                re + @splitchr + py
                        FROM    @re a ,
                                YingShe b
                        WHERE   a.id = @i - 1
                                AND b.chr = SUBSTRING(@str, @i, 1)
            END

        INSERT  INTO @tb
                SELECT  re
                FROM    @re
                WHERE   id = @i
        RETURN 
    END

GO