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

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

其他回答

另一个UDF，希望足够通用，并且不假设你是否想四舍五入到一个特定的小数点后数位:

CREATE FUNCTION [dbo].[fn_FormatNumber] (@number decimal(38,18))

RETURNS varchar(50)

BEGIN
    -- remove minus sign before applying thousands seperator
    DECLARE @negative bit
    SET @negative = CASE WHEN @number < 0 THEN 1 ELSE 0 END
    SET @number = ABS(@number)

    -- add thousands seperator for every 3 digits to the left of the decimal place
    DECLARE @pos int, @result varchar(50) = CAST(@number AS varchar(50))
    SELECT @pos = CHARINDEX('.', @result)
    WHILE @pos > 4
    BEGIN
        SET @result = STUFF(@result, @pos-3, 0, ',')
        SELECT @pos = CHARINDEX(',', @result)
    END

    -- remove trailing zeros
    WHILE RIGHT(@result, 1) = '0'
        SET @result = LEFT(@result, LEN(@result)-1)
    -- remove decimal place if not required
    IF RIGHT(@result, 1) = '.'
        SET @result = LEFT(@result, LEN(@result)-1)

    IF @negative = 1
        SET @result = '-' + @result

    RETURN @result
END

2015-05-28 05:04:10

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

这属于Phil Hunt的回答的评论，但是，唉，我没有代表。

剥去”。在数字字符串的末尾加上00"，parsename就非常方便了。它标记以句点分隔的字符串并返回指定的元素，从最右边的标记作为元素1开始。

SELECT PARSENAME(CONVERT(varchar, CAST(987654321 AS money), 1), 2)

收益率“987654321”

2017-11-07 15:33:07

我建议用Replace代替Substring来避免字符串长度问题:

REPLACE(CONVERT(varchar(20), (CAST(SUM(table.value) AS money)), 1), '.00', '')

2011-09-23 21:05:29

演示1

演示如何添加逗号:

PRINT FORMATMESSAGE('The number is: %s', format(5000000, '#,##0'))
-- Output
The number is: 5,000,000

演示2

演示逗号和小数点。注意，如果需要，它会四舍五入最后一位数字。

PRINT FORMATMESSAGE('The number is: %s', format(5000000.759145678, '#,##0.00'))
-- Output
The number is: 5,000,000.76

兼容性

SQL Server 2012+。

2016-03-31 19:49:31

我如何在T-SQL用逗号格式化一个数字?

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