PadLeft function in T-SQL

Question

I have the following table A:

id
----
1
2
12
123
1234

I need to left-pad the id values with zero\'s:

id
----
0         


        

Answer 1

Create Function :

    Create FUNCTION [dbo].[PadLeft]
      (
        @Text NVARCHAR(MAX) ,
        @Replace NVARCHAR(MAX) ,
        @Len INT
      )
RETURNS NVARCHAR(MAX)
AS
    BEGIN 


        DECLARE @var NVARCHAR(MAX) 

        SELECT @var = ISNULL(LTRIM(RTRIM(@Text)) , '')


        RETURN   RIGHT(REPLICATE(@Replace,@Len)+ @var, @Len)


    END

Example:

Select dbo.PadLeft('123456','0',8)

Answer 2

I created a function:

CREATE FUNCTION [dbo].[fnPadLeft](@int int, @Length tinyint)
RETURNS varchar(255) 
AS 
BEGIN
    DECLARE @strInt varchar(255)

    SET @strInt = CAST(@int as varchar(255))
    RETURN (REPLICATE('0', (@Length - LEN(@strInt))) + @strInt);
END;

Use: select dbo.fnPadLeft(123, 10)

Returns: 0000000123

Answer 3

Old post, but maybe this helps someone out:

To complete until it ends up with 4 non-blank characters:

SELECT RIGHT ('0000'+COLUMNNAME, 4) FROM TABLENAME;

To complete until 10:

SELECT RIGHT ('0000000000'+COLUMNNAME, 10) FROM TABLENAME;

In case the column is numeric, convert it to varchar first with such code:

Select RIGHT('0000'+Convert(nvarchar(20), COLUMNNAME), 4)
From TABLENAME

And to complete until 10 with a numeric field:

SELECT RIGHT ('0000000000'+Convert(nvarchar(20), COLUMNNAME), 10) FROM TABLENAME;

Answer 4

This is what I normally use when I need to pad a value.

SET @PaddedValue = REPLICATE('0', @Length - LEN(@OrigValue)) + CAST(@OrigValue as VARCHAR)

Answer 5

I needed this in a function on SQL server and adjusted Patrick's answer a bit.

declare @dossierId int = 123
declare @padded_id varchar(7)


set @padded_id = REPLACE(
              SPACE(7 - LEN(@dossierId)) + convert(varchar(7), @dossierId), 
              SPACE(1),  
              '0') 

SELECT @dossierId as '@dossierId'
      ,SPACE(LEN(@dossierId)) + convert(varchar(7)
      ,@dossierId) as withSpaces
      ,@padded_id as '@padded_id'