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

Looks like the C-style terminator is a terminator in SQL as well:

SELECT  REPLACE(bad, CHAR(0), ' ')
FROM    (
         SELECT 'a' + CHAR(0) + 'b' AS bad
        ) AS X

Looks like it's also dependent on COLLATION:

SELECT  REPLACE(CAST(bad COLLATE SQL_Latin1_General_CP1_CI_AS AS varchar(10)), CHAR(0), ' ')
FROM    (
         SELECT 'a' + CHAR(0) + 'b' AS bad
        ) AS X

works as expected, compared to:

SELECT  REPLACE(CAST(bad COLLATE Latin1_General_CI_AS AS varchar(10)), CHAR(0), ' ')
FROM    (
         SELECT 'a' + CHAR(0) + 'b' AS bad
        ) AS X