ALTER TABLE - Rename a column This is driving me nuts!

I want to rename a column from read-more to read_more in my blog table

I tried all this:

  ALTER TABLE blog RENAME COLUMN read-more to read_more;
  ALTER TABLE blog CHANGE COLUMN 'read-more' 'read_more' VARCHAR(255) NOT NULL;


And I always get this!

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'COLUMN read-more to read_more' at line 1


I'm using MySQL 5.5
The valid syntax is close to your second try, but you need to escape the column names with backticks not with single quotes:

ALTER TABLE `blog` CHANGE COLUMN `read-more` `read_more` VARCHAR(255) NOT NULL;