How do I add to each row in MySQL?

Question

We have a column that is a simple integer. We want to add to each row the value 10. How do we do it in sql for the MySQL database?

Actually we have another column th

Answer 1

Integers:

UPDATE table_name SET int_column_value = int_column_value + 10;
UPDATE table_name SET int_column_value = 10 WHERE int_column_value IS NULL;

Dates:

UPDATE table_name SET date_column_value = DATEADD(date_column_value, INTERVAL 1 MONTH);

More info: http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_affffdate