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Asked: 2026-05-11T10:38:02+00:00

What is the best practice for right-justifying a numeric in TSQL? I have to

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What is the best practice for right-justifying a numeric in TSQL?

I have to format a fixed length extract file and need to have the Numeric fields right justified. (I am using SQL Server 2005)

I found this, which seems pretty straight forward.

right('            '+convert(varchar(20),a.num),12)

Here is the full Select statement

select     a.num,     fixed_number =         right('            '+convert(varchar(20),a.num),12) from     (     --Test Data     select num = 2400.00    union all     select num = 385.00 union all     select num = 123454.34     ) a  Results:  num        fixed_number  ---------- ------------  2400.00         2400.00 385.00           385.00 123454.34     123454.34  (3 row(s) affected)

I am asking this question because I found this line of code at work, which appears INSANELY complex (It is also removing the decimal and zero filling)

CAST(REPLACE(REPLICATE('0', 12 - LEN(REPLACE(CAST(CONVERT(DECIMAL(10,2),@DD8DBAMT) AS VARCHAR),'.','')))  + CAST(CONVERT(DECIMAL(10,2),@DD8DBAMT) AS VARCHAR),'.','') AS VARCHAR(12))

Updated:

Daniel Pratt’s idea of using a function got me looking at SQL# (which we own). It has a function called PadLeft, which surprisingly enough had the same parameters and functionality as Daniel Pratt’s fn_PadRight function defined in his answer below.

Here is how to use SQL# function:

DECLARE @F6D2 AS DECIMAL(8,2) SET @F6D2 = 0 SQL#.String_PadLeft(@F6D2,9,' ') SQL#.String_PadLeft(123.400,9,' ') SQL#.String_PadLeft('abc',9,' ')

It can take both numbers and strings.

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  1. The only thing I can suggest to help with the ‘insane complexity’ is to encapsulate it in one or more functions. Here’s a somewhat modified version of something we’re using:

    CREATE FUNCTION [dbo].[fn_PadRight] (     @Value nvarchar(4000)     ,@NewLength int     ,@PadChar nchar(1) = ' ' ) RETURNS nvarchar(4000) AS BEGIN     DECLARE @ValueLength int     SET @ValueLength = LEN(@Value)      IF (@NewLength > @ValueLength) BEGIN         SET @Value = @Value + REPLICATE(@PadChar, @NewLength - @ValueLength)     END      RETURN @Value END GO  CREATE FUNCTION [dbo].[fn_FormatAmountDE] (     @Value money ) RETURNS nvarchar(4000) AS BEGIN     RETURN [dbo].[fn_PadRight](REPLACE(CAST(@Value AS varchar), '.', ''), 12, '0') END GO
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