Karam Chand <[EMAIL PROTECTED]> wrote:
> How can I add comment to a column?

Use COMMENT keyword:

CREATE TABLE test(
id int NOT NULL auto_increment COMMENT 'this is a comment',
PRIMARY KEY  (id)
) TYPE=MyISAM;

> 
> karam
> --- Egor Egorov <[EMAIL PROTECTED]> wrote:
>> Karam Chand <[EMAIL PROTECTED]> wrote:
>> > 
>> > I have 4.1.0-alpha-max-nt. When i issue a command
>> -
>> > 
>> > show full fields from tblname;
>> > 
>> > I get information about the fields in the table.
>> There
>> > are two columns i.e. EXTRA and COMMENTS which is
>> > always blank. I cant seem to figure out what
>> > information they provide. The SHOW FULL FIELDS...
>> in
>> > my MySQL Doc does not talk on this columns.
>> 
>> Extra shows if column has attribute AUTO_INCREMENT.
>> Comments shows comment on the column level. For
>> example:
>> 
>> mysql> show full fields from test;
>>
> +-------+---------+-----------+------+-----+---------+----------------+---------------------------------+-------------------+
>> | Field | Type    | Collation | Null | Key | Default
>> | Extra          | Privileges                      |
>> Comment           |
>>
> +-------+---------+-----------+------+-----+---------+----------------+---------------------------------+-------------------+
>> | id    | int(11) | NULL      |      | PRI | NULL   
>> | auto_increment | select,insert,update,references |
>> this is a comment |
>>
> +-------+---------+-----------+------+-----+---------+----------------+---------------------------------+-------------------+
>> 1 row in set (0.01 sec)



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