How to remove invisible characters in t-sql?

Question

I tried

UPDATE TABLENAME SET COLUMNNAME = REPLACE(COLUMNNAME, \'\\t\', \'\')

But I don\'t know how to write the TAB in t-sql

Answer 1

In the beginning of my TSql sProcs, I often put

   Declare @nl Char(2) = char(13) + char(10)
   Declare @tab Char(1) = char(9)
   etc...

Then you can use those declared variables anywhere in the rest of the proc without loss of clarity...