Question

如何在以下范围内生成唯一收据编号： GA00000-GZ99999？我不允许使用'I'和'O'字母，所以GI00000-GI99999＆amp; GO00000-GO99999将被排除在外。

理想情况下，我想在T-SQL中创建它，但也可以在VB.Net中创建它。这个数字将存储在SQL中，我可以在生成下一个数字之前访问它。它们不必是顺序的。

感谢。

Answer 1

创建允许作为第一个数字的所有字符的array。

对于任何数字收据ID n，收据代码为G + array[n/1000000] + n % 1000000。

Answer 2

保留后缀指针。当你的索引包装超过99999时，递增它。检查您的特殊情况和用尽情况（例如Z）。

Answer 3

这是一个VB.NET版本，可以获得下一个序列号，前一个序列号。我想我已经涵盖了所有案例。

Private Const FirstReceiptNumber As String = "GA00000"

Public Function GenerateReceiptNumber(ByVal lastNumber As String) As String

    If lastNumber.Length <> 7 Then
        Throw New ArgumentException("Incorrect length", "lastNumber")
    End If

    If lastNumber.StartsWith("G") = False Then
        Throw New ArgumentException("Incorrect start character", "lastNumber")
    End If

    Dim letterPortion As Char = lastNumber.Chars(1)

    If letterPortion < "A"c Or letterPortion > "Z"c Then
        Throw New ArgumentException("Non-letter second character", "lastNumber")
    End If

    If letterPortion = "I"c Or letterPortion = "O"c Then
        Throw New ArgumentException("Invalid second character", "lastNumber")
    End If

    Dim numericPortionString As String = lastNumber.Substring(2)
    Dim numericPortion As Integer

    If Integer.TryParse(numericPortionString, numericPortion) = False Then
        Throw New ArgumentException("Invalid numeric portion", "lastNumber")
    End If

    If numericPortion = 99999 Then
        If letterPortion = "Z"c Then
            Throw New ArgumentException("No more receipt numbers possible", "lastNumber")
        End If

        numericPortion = 0
        letterPortion = letterPortion + Chr(1)

        If letterPortion = "I"c Or letterPortion = "O"c Then
            letterPortion = letterPortion + Chr(1)
        End If
    Else
        numericPortion = numericPortion + 1
    End If

    Return String.Format("G{0}{1:00000}", letterPortion, numericPortion)

End Function

Answer 4

我决定这样做：

CREATE FUNCTION [dbo].[fn_generateReceiptNumber]() 
RETURNS NCHAR(7)
AS
BEGIN
    -- Declare the return variable here
    DECLARE @result NCHAR(7);   
    DECLARE @prefix NCHAR(1);
    DECLARE @suffix INT;
    DECLARE @currentMax NCHAR(7);

    SELECT @currentMax = MAX(ISNULL(fp.CustomReceiptNo, 'GA00001')) FROM dbo.FinPayment fp;

    SELECT @prefix = SUBSTRING(@currentMax,2,1);
    SELECT @suffix = CAST(SUBSTRING(@currentMax,3,7) AS INT);

    IF((@suffix + 1) > 99999)
    BEGIN
        SELECT @suffix = 0;
    END
    ELSE
    BEGIN
        SELECT @suffix = @suffix + 1;
    END

    IF(@suffix = 0)
    BEGIN
        IF(@prefix = 'Z')
        BEGIN
            RETURN -1;
        END
        ELSE
        BEGIN
            IF(NCHAR(UNICODE(@prefix)+1) IN ('I', 'O'))
            BEGIN
                SELECT @prefix = NCHAR(UNICODE(@prefix)+2);
            END
            ELSE
            BEGIN
                SELECT @prefix = NCHAR(UNICODE(@prefix)+1);
            END
        END
    END

    -- Return the result of the function
    SELECT @result = NCHAR(71) + @prefix + CAST(RIGHT('00000' + RTRIM(@suffix), 5) AS NCHAR(5));
    RETURN @result;

END
GO

感谢大家的投入。史蒂夫。

生成此范围内的收据编号

4 个答案: