Hi Terence,
I guess I was a bit unclear on my comment on the
SELECT *. Anyway you did what I meant, i.e. changed
one of your category_id's so that the set
of columnnames ( as implied by the SELECT * ) becomes
unique. What happens is that your SELECT * becomes
SELECT ticket_id,category_id,category_id,category_name
when MySQL deduces what to use for columnnames in the view.
/Johan
Terence wrote:
Johan Höök wrote:
Hi Terence,
I think your problem lies in your SELECT *
If you look at the columnheaders below you get category_id twice.
I guess you have to specify your columns with aliases.
/Johan
Hi Johan,
Nope, if I change the column name to category_id1 then it's okay. See
this: (apologies for the previous typo in the reproducible script)
create table `ticket_master` (
`ticket_id` int (5) NOT NULL AUTO_INCREMENT ,
`category_id` int (5) NULL,
PRIMARY KEY ( `ticket_id` ));
Query OK, 0 rows affected
create table `category_master` (
`category_id` int (5) NOT NULL AUTO_INCREMENT ,
`category_name` varchar (20) NULL,
PRIMARY KEY ( `category_id` ));
Query OK, 0 rows affected
CREATE VIEW `v_tickets` AS
(
SELECT * FROM ticket_master tm, category_master cm
WHERE tm.category_id = cm.category_id
);
ERROR 1060 : Duplicate column name 'category_id'
alter table `category_master` ,change `category_id` `category_id1` int
(5) NOT NULL AUTO_INCREMENT ;
CREATE VIEW `v_tickets` AS
(
SELECT * FROM ticket_master tm, category_master cm
WHERE tm.category_id = cm.category_id1
);
Query OK, 0 rows affected
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