How can I check if an SQL result contains a newline character?

SELECT *
FROM your_table
WHERE your_column LIKE '%' + CHAR(10) + '%'

Or...

SELECT *
FROM your_table
WHERE CHARINDEX(CHAR(10), your_column) > 0

For any fellow MySQL users who end up here:

SELECT *
FROM your_table
WHERE your_column LIKE CONCAT('%', CHAR(10), '%')

In Oracle, try the below command

SELECT * FROM table_name WHERE field_name LIKE ('%'||chr(10)||'%');

Use char(13) for '\r' and char(10) for '\n'

SELECT *
FROM your_table
WHERE your_column LIKE '%' + CHAR(10) + '%'

or

SELECT *
FROM your_table
WHERE your_column LIKE '%' + CHAR(13) + CHAR(10) + '%'