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Re: newbie question


On Wed, Jun 11, 2014 at 8:32 PM, Roberto Spadim <roberto@xxxxxxxxxxxxx> wrote:
> Guys, i'm with a "newbie" question
> I need to swap a primary key value, for example:
> create table test (
>  id int not null default 0,
>   other varchar(255) not null default '',
>  primary key(id)
> );
> insert into test (1,'a');
> insert into test (2,'b');
> now i want that (2,'b') becomes (1,'b') and (1,'a') becomes (2,'a')
> the point is, how to do this, with only one UPDATE without duplicate column
> id value? and without delete values?

How about this:

update test set other = 'b' where id = 1;
update test set other = 'a' where id = 2;

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