On 3/21/06, Robert DiFalco wrote:
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN may out perform an INNER JOIN in those cases
where they would produce identical result sets. i.e. there are no keys
in the left table that do not exist in the right
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN may out perform an INNER JOIN in those cases
where they would produce identical result sets. i.e. there are no keys
in the left table that do not exist in the right table.
Is this true? If so, it
- Original Message -
From: Jochem van Dieten [EMAIL PROTECTED]
To: mysql@lists.mysql.com
Sent: Tuesday, March 21, 2006 3:53 AM
Subject: Re: RIGHT JOIN better than INNER JOIN?
On 3/21/06, Robert DiFalco wrote:
I apologize if this is a naive question but it appears through my
testing
DiFalco [mailto:[EMAIL PROTECTED]
Sent: Monday, March 20, 2006 5:12 PM
To: mysql@lists.mysql.com
Subject: RIGHT JOIN better than INNER JOIN?
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN may out perform an INNER JOIN in those cases
where they would
Subject: Re: RIGHT JOIN better than INNER JOIN?
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN may out perform an INNER JOIN in those cases
where they would produce identical result sets. i.e. there are no keys
in the left table that do not exist
Robert,
Of course one should use the right JOIN for the job. But let me ask you,
which join would you use here?
You have a table called Descriptors, it has a field called nameID which
is a unique key that relates to a Names table made up of a unique
identity and a VARCHAR name. I think
.
-Original Message-
From: Martijn Tonies [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 21, 2006 9:43 AM
To: mysql@lists.mysql.com
Subject: Re: RIGHT JOIN better than INNER JOIN?
Robert,
Of course one should use the right JOIN for the job. But let me ask
you, which join would you use here?
You
Robert DiFalco wrote:
For me the argument is a little pedantic. The contract of the descriptor
table is that it must reference a name; there is code and constraints to
enforce this. I am happy to have the query return nulls to indicate a
programming error that can be quickly addressed. _If_
, 2006 2:04 PM
Subject: RE: RIGHT JOIN better than INNER JOIN?
For me the argument is a little pedantic. The contract of the descriptor
table is that it must reference a name; there is code and constraints to
enforce this. I am happy to have the query return nulls to indicate a
programming error
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN may out perform an INNER JOIN in those cases
where they would produce identical result sets. i.e. there are no keys
in the left table that do not exist in the right table.
Is this true? If so, it this
that interest you.
--
Rhino
- Original Message -
From: Robert DiFalco [EMAIL PROTECTED]
To: mysql@lists.mysql.com
Sent: Monday, March 20, 2006 7:11 PM
Subject: RIGHT JOIN better than INNER JOIN?
I apologize if this is a naive question but it appears through my
testing that a RIGHT JOIN
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