change values mysql code example

Example 1: mysql add column default value

ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0;

Example 2: how to update an attribute in MySQL

UPDATE table_name
SET variable = 'changed field', variable = 'another changed field'
WHERE firstline_name = 1;

Example 3: mysql change value

UPDATE [LOW_PRIORITY] [IGNORE] table_name 
SET 
    column_name1 = expr1,
    column_name2 = expr2,
    ...
[WHERE
    condition];