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...