Обсуждение: Is there a way to drop a column?

Somehow some columns from one of my tables "melded" with another table.
I'm trying to figure out how this happened, but in the meantime, I'd
like to be able to delete the extra columns in the table.

I can see a way to "alter table ... add column". Is there a way to
"alter table ... drop column"?

Thanks.
-Tony

On Tue, 30 May 2000, G. Anthony Reina wrote:

> Somehow some columns from one of my tables "melded" with another table.
> I'm trying to figure out how this happened, but in the meantime, I'd
> like to be able to delete the extra columns in the table.
>
> I can see a way to "alter table ... add column". Is there a way to
> "alter table ... drop column"?

 SELECT without_a_column INTO xxx FROM tab;
 DROP TABLE tab;
 ALTER TABLE xxx RENAME TO tab;

 OK?

                    Karel

Karel Zak wrote:

>
> > I can see a way to "alter table ... add column". Is there a way to
> > "alter table ... drop column"?
>
>  SELECT without_a_column INTO xxx FROM tab;
>  DROP TABLE tab;
>  ALTER TABLE xxx RENAME TO tab;
>

Thanks. That worked.

-Tony

Karel Zak wrote:
>
> On Tue, 30 May 2000, G. Anthony Reina wrote:
>
> > Somehow some columns from one of my tables "melded" with another table.
> > I'm trying to figure out how this happened, but in the meantime, I'd
> > like to be able to delete the extra columns in the table.
> >
> > I can see a way to "alter table ... add column". Is there a way to
> > "alter table ... drop column"?
>
>  SELECT without_a_column INTO xxx FROM tab;
>  DROP TABLE tab;
>  ALTER TABLE xxx RENAME TO tab;
>
>  OK?
>
I could have sworn this was supposed to be added into version 7.  Did
they just make "alter table drop column" into a alias for using a temp
table?