How to update multiple rows with one query

It’s not so hard to update multiple rows with only one query. All we need to do is to use MySQL “CASE” functionality.

mysql_query(" update category
    set price = 
    case 
    when name = 1 then '$_POST[price1]'
    when name = 2 then '$_POST[price2]'
    when name = 3 then '$_POST[price3]'
    end
    WHERE name in (1,2,3)");