Capitalize first letter of each word, in existing table

There’s no MySQL function to do that, you have to write your own. In the following link there’s an implementation:

MySQL Capitalize Function

In order to use it, first you need to create the function in the database. You can do this, for example, using MySQL Query Browser (right-click the database name and select Create new Function).

After creating the function, you can update the values in the table with a query like this:

UPDATE users SET name = CAP_FIRST(name);