sql 1.1 1.1.1 1.10.1 排序

ALTER FUNCTION [dbo].[SequenceToOrderNum] ( @Sequence VARCHAR(50) )
RETURNS INT
    BEGIN
        DECLARE @Count INT
        DECLARE @OrderNum INT 
        SET @Count = 6 --根据需求改变
        SET @OrderNum = 0
        WHILE CHARINDEX(‘.‘, @Sequence) > 0
            BEGIN
                SET @OrderNum = @OrderNum
                    + CAST(SUBSTRING(@Sequence, 0, CHARINDEX(‘.‘, @Sequence)) AS NUMERIC)
                    * POWER(20, @Count)--根据需求改变
                    
                SET @Sequence = SUBSTRING(@Sequence,
                                          CHARINDEX(‘.‘, @Sequence) + 1,
                                          LEN(@Sequence))
                                                
                SET @Count = @Count - 1
            END
          
        SET @OrderNum = @OrderNum + CAST(@Sequence AS NUMERIC) * POWER(20,---根据需求改变
                                                              @Count)
        RETURN @OrderNum

    END


 --结果: 3.3.1.3.1=>201784400