how to change table column value sql code example

Example 1: how to change the value of a table in sql

UPDATE employees 
SET 
    address = '1300 Carter St',
    city = 'San Jose',
    postalcode = 95125,
    region = 'CA'
WHERE
    employeeID = 3;

Example 2: alter table query sql server change column

ALTER TABLE table_name
  DROP COLUMN column_name;