re: How come I can't use an "AS" field in other operations?

[Egor Egorov]

On Wednesday 02 April 2003 04:04, Daevid Vincent wrote:
> Is this a bug or just not implemented in 3.23.56-Max?
>
> mysql> SELECT alarm_notes, DATE_FORMAT(alarm_date,'%m/%d/%y %h:%i %p') AS
> alarm_date_format, IFNULL(CONCAT(contact_fname, ' ', alarm_date),
> alarm_date_format) AS contact_name, contact_email, contact_phone FROM
> alarm_table LEFT JOIN contact_table ON alarm_contact_table_id = contact_id
> WHERE alarm_rep_table_id = '1' ORDER BY alarm_date;
> ERROR 1054: Unknown column 'alarm_date_format' in 'field list'

[skip]

It's not a bug. You can't reference column aliases in the select list. 



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