Function to display integer as binary string

,

This will convert an integer to a binary string representation.

Range (bigint) -9223372036854775808 to 9223372036854775807

64-bit maximum result. The second parameter specifies the string length of the result. 

Examples:

SELECT [dbo].[ConvertIntToBinaryString] (15, 8)

returns  00001111

SELECT [dbo].[ConvertIntToBinaryString] (15, 4)

returns  1111

It works by first converting the number to HEX and then replacing each hex digit with its binary equivalent.

-- *******************************************************************
-- Converts an integer to its binary representation 
-- Sample Usage:
--     SELECT [dbo].[ConvertIntToBinaryString] (15, 8)
--     SELECT [dbo].[ConvertIntToBinaryString] (-1, default)
-- *******************************************************************
CREATE FUNCTION [dbo].[ConvertIntToBinaryString]
(
    @Number		bigint,
    @OutputBits tinyint = 64
)
RETURNS varchar(64)
AS
BEGIN

    RETURN RIGHT(
           REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
           REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
                CONVERT(varchar(64),CONVERT(binary(8),@Number),2)
                , '0','0000'), '1','0001'), '2','0010'), '3','0011'), '4','0100')
                , '5','0101'), '6','0110'), '7','0111'), '8','1000') , '9','1001')
                , 'A','1010') ,'B','1011') ,'C','1100') ,'D','1101') ,'E','1110') ,'F','1111')
          ,@OutputBits)

END
GO

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