我如何在T-SQL用逗号格式化一个数字?

I'm running some administrative queries and compiling results from sp_spaceused in SQL Server 2008 to look at data/index space ratios of some tables in my database. Of course I am getting all sorts of large numbers in the results and my eyes are starting to gloss over. It would be really convenient if I could format all those numbers with commas (987654321 becomes 987,654,321). Funny that in all the many years I've used SQL Server, this issue has never come up since most of the time I would be doing formatting at the presentation layer, but in this case the T-SQL result in SSMS is the presentation.

我考虑过只创建一个简单的CLR UDF来解决这个问题，但似乎这应该可以在普通的旧T-SQL中完成。所以，我将在这里提出一个问题-如何在香草T-SQL中进行数字格式化?

当前回答

对于2012年以前不包含FORMAT函数的SQL Server，创建如下函数:

CREATE FUNCTION FormatCurrency(@value numeric(30,2))
    RETURNS varchar(50)
    AS
    BEGIN
        DECLARE @NumAsChar VARCHAR(50)
        SET @NumAsChar = '$' + CONVERT(varchar(50), CAST(@Value AS money),1)
        RETURN @NumAsChar
    END

选择dbo.FormatCurrency (12345678) 返回12345678美元

如果你只想要逗号，就去掉$。

2019-09-13 00:01:28

其他回答

虽然我同意包括OP在内的所有人的观点，即格式化应该在表示层完成，但这种格式化可以在T-SQL中通过转换为money然后转换为varchar来完成。不过，这确实包括后面的小数，可以用SUBSTRING循环。

SELECT CONVERT(varchar, CAST(987654321 AS money), 1)

2010-12-07 14:02:44

试试上面的金钱技巧，这对于两个或更少有效数字的数值非常有效。我创建了自己的函数来用小数格式化数字:

CREATE FUNCTION [dbo].[fn_FormatWithCommas] 
(
    -- Add the parameters for the function here
    @value varchar(50)
)
RETURNS varchar(50)
AS
BEGIN
    -- Declare the return variable here
    DECLARE @WholeNumber varchar(50) = NULL, @Decimal varchar(10) = '', @CharIndex int = charindex('.', @value)

    IF (@CharIndex > 0)
        SELECT @WholeNumber = SUBSTRING(@value, 1, @CharIndex-1), @Decimal = SUBSTRING(@value, @CharIndex, LEN(@value))
    ELSE
        SET @WholeNumber = @value

    IF(LEN(@WholeNumber) > 3)
        SET @WholeNumber = dbo.fn_FormatWithCommas(SUBSTRING(@WholeNumber, 1, LEN(@WholeNumber)-3)) + ',' + RIGHT(@WholeNumber, 3)



    -- Return the result of the function
    RETURN @WholeNumber + @Decimal

END

2011-07-25 15:22:11

请尝试以下查询:

SELECT FORMAT(987654321,'#,###,##0')

右小数点格式:

SELECT FORMAT(987654321,'#,###,##0.###\,###')

2018-03-30 11:14:05

对于2012年以前不包含FORMAT函数的SQL Server，创建如下函数:

CREATE FUNCTION FormatCurrency(@value numeric(30,2))
    RETURNS varchar(50)
    AS
    BEGIN
        DECLARE @NumAsChar VARCHAR(50)
        SET @NumAsChar = '$' + CONVERT(varchar(50), CAST(@Value AS money),1)
        RETURN @NumAsChar
    END

选择dbo.FormatCurrency (12345678) 返回12345678美元

如果你只想要逗号，就去掉$。

2019-09-13 00:01:28

这里是另一个t-sql UDF

CREATE FUNCTION dbo.Format(@num int)
returns varChar(30)
As
Begin
Declare @out varChar(30) = ''

  while @num > 0 Begin
      Set @out = str(@num % 1000, 3, 0) + Coalesce(','+@out, '')
      Set @num = @num / 1000
  End
  Return @out
End

2012-09-06 13:14:28

我如何在T-SQL用逗号格式化一个数字?

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