replace all column values equal to one string with another string

Question

I have a MYSQL table called traceclasses and I have a column in this table called value with some of its cell values equal to E as shown below. I would like to replace all such values with U. Which query should I use to do this?

Answer 1

You are looking for update :

update t
    set value = 'U'
    where value = 'E';