What is the Null Character literal in TSQL?

Question

I am wondering what the literal for a Null character (e.g. \'\\0\') is in TSQL.

Note: not a NULL field value, but the null character (see link).

Answer 1

A VARBINARY cast should work with any collation

SELECT 
   REPLACE(CAST(CAST(fld AS VARCHAR(5)) AS VARBINARY(5)), 0x0, ',')
FROM 
   (SELECT 'QQ' + CHAR(0) + 'WW' COLLATE Latin1_General_CI_AS AS fld) AS T

SELECT 
   REPLACE(CAST(CAST(fld AS VARCHAR(5)) AS VARBINARY(5)), 0x0, ',')
FROM 
   (SELECT 'QQ' + CHAR(0) + 'WW' COLLATE SQL_Latin1_General_CP1_CI_AS AS fld) AS T 

>>QQ,WW
>>QQ,WW