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

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

其他回答

/*
  #------------------------------------------------------------------------#
  #            SQL Query Script                                            #
  #            ----------------                                            #
  # Funcion.:  dbo.fn_nDerecha ( Numero, Pos_Enteros, Pos_Decimales )      #
  #    Numero        : es el Numero o Valor a formatear                    #
  #    Pos_Enteros   : es la cantidad posiciones para Enteros              #
  #    Pos_Decimales : es la cantidad posiciones para Decimales            #
  #                                                                        #
  # OBJETIVO:  Formatear los Numeros con Coma y Justificado a la Derecha   #
  #  Por Ejemplo:                                                          #
  #   dbo.fn_nDerecha ( Numero, 9, 2 )         Resultado = ---,---,--9.99  #
  #               dado  Numero = 1234.56       Resultado =       1,234.56  #
  #               dado  Numero = -1.56         Resultado =          -1.56  #
  #               dado  Numero = -53783423.56  Resultado = -53,783,423.56  #
  #                                                                        #
  # Autor...:  Francisco Eugenio Cabrera Perez                             #
  # Fecha...:  Noviembre 25, 2015                                          #
  # Pais....:  Republica Dominicana                                        #
  #------------------------------------------------------------------------#
*/



CREATE FUNCTION [dbo].[fn_nDerecha]
(
    -- Agregue Argumentos, para personalizar la funcion a su conveniencia
    @Numero_str    varchar(max)
   ,@Pos_Enteros   int
   ,@Pos_Decimales int
)
RETURNS varchar(max)
AS
BEGIN
  --  Declare la variable del RETURN aqui, en este caso es RESULT
  declare @RESULTADO varchar(max)
  set     @RESULTADO = '****'

  -----------------------------------------------  --
  declare @Numero_num numeric(28,12)
  set     @Numero_num =
  (
  case when isnumeric(@Numero_str) = 0 
       then 0
       else round (convert( numeric(28,12), @Numero_str), @Pos_Decimales)
  end
  )
  --  -----------------------------------------------  --
  --  Aumenta @Pos_Enteros de @RESULTADO,
  --      si las posiciones de Enteros del dato @Numero_str es Mayor...
  --
  declare   @Num_Pos_Ent int
  set       @Num_Pos_Ent = len ( convert( varchar, convert(int, abs(@Numero_num) ) ) )
  --
  declare   @Pos_Ent_Mas int
  set       @Pos_Ent_Mas =
  (
  case when @Num_Pos_Ent > @Pos_Enteros
       then @Num_Pos_Ent - @Pos_Enteros
       else 0
  end
  )
  set       @Pos_Enteros = @Pos_Enteros + @Pos_Ent_Mas
  --
  --  -----------------------------------------------  --
  declare @p_Signo_ctd       int
  set     @p_Signo_ctd       = (case when @Numero_num < 1 then 1 else 0 end)
  --
  declare @p_Comas_ctd       int
  set     @p_Comas_ctd       = ( @Pos_Enteros - 1 ) / 3
  --
  declare @p_Punto_ctd       int
  set     @p_Punto_ctd       = (case when @Pos_Decimales > 0 then 1 else 0 end)
  --
  declare @p_input_Longitud  int
  set     @p_input_Longitud  = ( @p_Signo_ctd + @Pos_Enteros ) +
                                 @p_Punto_ctd + @Pos_Decimales
  --
  declare @p_output_Longitud int
  set     @p_output_Longitud = ( @p_Signo_ctd + @Pos_Enteros   + @p_Comas_ctd )
                             + ( @p_Punto_ctd + @Pos_Decimales )
  --
  --  ===================================================================  --


  declare @Valor_str varchar(max)
  set     @Valor_str = str(@Numero_num, @p_input_Longitud, @Pos_Decimales)

  declare @V_Ent_str varchar(max)
  set     @V_Ent_str = 
  (case when @Pos_Decimales > 0 
        then substring( @Valor_str, 0, charindex('.', @Valor_str, 0) )
        else            @Valor_str end)
  --
  declare @V_Dec_str varchar(max)
  set     @V_Dec_str = 
  (case when @Pos_Decimales > 0 
        then '.' + right(@Valor_str, @Pos_Decimales)
        else '' end)
  --
  set @V_Ent_str = convert(VARCHAR, convert(money, @V_Ent_str), 1) 
  set @V_Ent_str = substring( @V_Ent_str, 0, charindex('.', @V_Ent_str, 0) )
  --


  set @RESULTADO    = @V_Ent_str + @V_Dec_str 
  --
  set @RESULTADO = ( replicate( ' ', @p_output_Longitud - len(@RESULTADO) ) + @RESULTADO )
  --

  --  ===================================================================  -

-- =================================================================== -

  RETURN @RESULTADO
END

  --  ===================================================================  --

/* 这个函数需要3个参数:第一个参数是@Numero_str,它将数字作为数据输入,其他2个参数指定如何格式化输出信息,这些参数是@Pos_Enteros和@Pos_Decimales,它们指定要为作为输入参数传递的数字显示多少个整数和小数。 * /

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”

在SQL Server 2012及更高版本中,这将用逗号格式化一个数字:

select format([Number], 'N0')

您还可以将0更改为您想要的小数点后数位。

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

请尝试以下查询:

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

右小数点格式:

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