Обсуждение: difference in INDEX's

Is there a difference in doing:

foo        int PRIMARY KEY

and

CREATE INDEX idx1 on table (foo);


does both do the same thing (create an index)? is one faster or preffered
over the other?


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Brian wrote:
> Is there a difference in doing:
>
> foo             int PRIMARY KEY
>
> and
>
> CREATE INDEX idx1 on table (foo);

Yes,

create table bar (foo int PRIMARY KEY);

is the same as

create table bar (foo int NOT NULL); CREATE UNIQUE INDEX bar_pkey on
table bar(foo);

The first is easier to type,
the second is preferable (faster) if you will initially do a lot of
inserts, like:

create table...
loads of inserts...
create unique index...