How to delete all the tab and enter in a table?
If you want to get rid of a \n at the start of a column you can run something like this:

UPDATE your_table SET col1 = substring(col1, -1) WHERE col1 like '\n%';


You can do something similar for other columns or changing \n for \t.

If you want to delete all \t and \n, anywhere on the string, you can use:

UPDATE your_table SET col1 = replace(replace(col1, '\t', ''), '\n', '');