How to replace sql server 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, '.', '-');