defining a key in a table

[pelegk2]

how do i define a col of a table (where the col is already defined as int(8) )
how can i change this col to be autoincremenat,key
(at the moment all of the col is set with 0 (zero)
thnaks i nadvance
peleg

[bastien]

http://dev.mysql.com/doc/mysql/en/alter-table.html