How to replace string in sql code example

Example 1: sql query with replace function

##sql query with replace function
#syntax
UPDATE tableName
SET  column_name = REPLACE(column_name, 'fromStringValue', 'toStringValue');

#Example 
Update  tbl_employee
Set designation = REPLACE(designation, 'SEO', 'Developer');

Example 2: sql replace character in string in all records

UPDATE employees 
SET 
    phone_number = REPLACE(phone_number, '.', '-');

Example 3: replace \n sql

SELECT REPLACE(REPLACE(@str, CHAR(13), ''), CHAR(10), '')

Example 4: stuff and replace in sql

STUFF Function: This function is used to
overwrite existing character or inserts
a string into another string. 

REPLACE function: This function is used 
to replace the existing characters
of all the occurrences.