What about:
select `id`, `column1` as 'column2', `column2` as 'column1';
Steve
On Wed, 2010-09-22 at 13:06 -0500, Johnny Withers wrote:
> Couldn't you just rename the columns?
>
> JW
>
>
> On Wed, Sep 22, 2010 at 11:53 AM, Rolando Edwards
> <redwa...@logicworks.net>wrote:
>
> > I ran these commands:
> >
> > use test
> > DROP TABLE IF EXISTS mydata;
> > CREATE TABLE mydata (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,column1
> > CHAR(1),column2 CHAR(2));
> > INSERT INTO mydata (column1,column2) VALUES ('a','z'), ('b','y'),
> > ('c','x'), ('d','w'), ('e','v');
> > SELECT * FROM mydata;
> > UPDATE mydata A LEFT JOIN mydata B USING (id) SET
> > A.column1=B.column2,A.column2=B.column1;
> > SELECT * FROM mydata;
> >
> > I got this output:
> >
> > lwdba@ (DB test) :: use test
> > Database changed
> > lwdba@ (DB test) :: DROP TABLE IF EXISTS mydata;
> > Query OK, 0 rows affected (0.00 sec)
> >
> > lwdba@ (DB test) :: CREATE TABLE mydata (id INT NOT NULL AUTO_INCREMENT
> > PRIMARY KEY,column1 CHAR(1),column2 CHAR(2));
> > Query OK, 0 rows affected (0.05 sec)
> >
> > lwdba@ (DB test) :: INSERT INTO mydata (column1,column2) VALUES ('a','z'),
> > ('b','y'), ('c','x'), ('d','w'), ('e','v');
> > Query OK, 5 rows affected (0.00 sec)
> > Records: 5 Duplicates: 0 Warnings: 0
> >
> > lwdba@ (DB test) :: SELECT * FROM mydata;
> > +----+---------+---------+
> > | id | column1 | column2 |
> > +----+---------+---------+
> > | 1 | a | z |
> > | 2 | b | y |
> > | 3 | c | x |
> > | 4 | d | w |
> > | 5 | e | v |
> > +----+---------+---------+
> > 5 rows in set (0.00 sec)
> >
> > lwdba@ (DB test) :: UPDATE mydata A LEFT JOIN mydata B USING (id) SET
> > A.column1=B.column2,A.column2=B.column1;
> > Query OK, 5 rows affected (0.03 sec)
> > Rows matched: 5 Changed: 5 Warnings: 0
> >
> > lwdba@ (DB test) :: SELECT * FROM mydata;
> > +----+---------+---------+
> > | id | column1 | column2 |
> > +----+---------+---------+
> > | 1 | z | a |
> > | 2 | y | b |
> > | 3 | x | c |
> > | 4 | w | d |
> > | 5 | v | e |
> > +----+---------+---------+
> > 5 rows in set (0.00 sec)
> >
> > GIVE IT A TRY !!!
> >
> > Rolando A. Edwards
> > MySQL DBA (CMDBA)
> >
> > 155 Avenue of the Americas, Fifth Floor
> > New York, NY 10013
> > 212-625-5307 (Work)
> > AIM & Skype : RolandoLogicWorx
> > redwa...@logicworks.net
> > http://www.linkedin.com/in/rolandoedwards
> >
> >
> > -----Original Message-----
> > From: nixofortune [mailto:nixofort...@googlemail.com]
> > Sent: Wednesday, September 22, 2010 12:30 PM
> > To: mysql@lists.mysql.com
> > Subject: Swap data in columns
> >
> > Hi all.
> >
> > Sorry for very simple question, just can't figure out the solution.
> > I need to swap data in column1 with data in column2.
> >
> >
> > +----+---------+---------+
> > | id | column1 | column2 |
> > +----+---------+---------+
> > | 1 | a | z |
> > | 2 | b | y |
> > | 3 | c | x |
> > | 4 | d | w |
> > | 5 | e | v |
> > +----+---------+---------+
> >
> > Can you achieve this with a simple query?
> > so for id 1 column1 = 'z' and column2 = 'a' and so on.
> >
> > Thanks guys,
> > Igor
> >
> > --
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> >
> >
>
>
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