mysql how to change information code example

Example 1: mysql change value

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

Example 2: how to update rows from a table when certain conditions are met in mysql

UPDATE table_name
SET column1 = value1, column2 = value2
WHERE condition <= condition AND condition != condition;