Possible Duplicate:
MySQL/PHP Search Efficiency
How to Add FullText Capability to the existing table in MySQL.
I've seen adding it directly at the time of table creation as follow.
CREATE TABLE articles (
id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
title VARCHAR(200),
body TEXT,
FULLTEXT (title,body)
);
But how to add FullText Manually after the table is created?