On 7/21/2010 1:02 PM, Tompkins Neil wrote:
Hi
So Just running a basic query I get returned the following :
table,type,possible_keys,key,key_len,ref,rows,Extra,
Products,ALL,9884,where used,
Therefore, I assume *ALL* is the worst possible type and should look at
adding a an index to this
Thanks for your reply, and sorry for not verifying in the manual. Another
couple of questions I have :
If I run a EXPLAIN query and SELECT against a primary key and SELECT fields
which are not indexed, I assume that returned EXPLAIN statement as below,
means I don't need to index additional
-Original Message-
From: Tompkins Neil [mailto:neil.tompk...@googlemail.com]
Sent: Thursday, July 22, 2010 3:39 PM
To: Shawn Green (MySQL)
Cc: mysql@lists.mysql.com
Subject: Re: combined or single indexes?
Thanks for your reply, and sorry for not verifying in the manual. Another
couple
-
From: Tompkins Neil [mailto:neil.tompk...@googlemail.com]
Sent: Thursday, July 22, 2010 3:39 PM
To: Shawn Green (MySQL)
Cc: mysql@lists.mysql.com
Subject: Re: combined or single indexes?
Thanks for your reply, and sorry for not verifying in the manual. Another
couple of questions I have
From: Tompkins Neil [mailto:neil.tompk...@googlemail.com]
Sent: Thursday, July 22, 2010 4:50 PM
To: Jerry Schwartz
Cc: Shawn Green (MySQL); mysql@lists.mysql.com
Subject: Re: combined or single indexes?
Thanks for the information Jerry. Just to confirm, you mentioned if you only
need one
@lists.mysql.com
Subject: Re: combined or single indexes?
Thanks for the information Jerry. Just to confirm, you mentioned
if you only need one key then you only need one key. My question
was that this particular query was using SELECT against a primary
key and other fields which
Hi
So Just running a basic query I get returned the following :
table,type,possible_keys,key,key_len,ref,rows,Extra,
Products,ALL,9884,where used,
Therefore, I assume *ALL* is the worst possible type and should look at
adding a an index to this particular field ?
Cheers
Neil
On Fri, Jul
At 12:43 AM 7/9/2010, you wrote:
On Fri, Jul 9, 2010 at 7:30 AM, Neil Tompkins
neil.tompk...@googlemail.comwrote:
Should we be looking to create a index for all fields that we might be
perform a select condition in a where clause for ?
Neil,
Keep in mind that the more indexes you add
@lists.mysql.com
Sent: Tuesday, July 06, 2010 6:41 PM
Subject: combined or single indexes?
Is there a benefit to a combined index on a table? Or is multiple
single
column indexes better?
If I have table 'foo' with columns a, b, and c. I will have a query
like:
select c from foo where a in (1,2,3
:41 PM
Subject: combined or single indexes?
Is there a benefit to a combined index on a table? Or is multiple single
column indexes better?
If I have table 'foo' with columns a, b, and c. I will have a query
like:
select c from foo where a in (1,2,3) and b 12345;
Is index on a,b better
the index, without getting data from the table.
--
Octavian
- Original Message - From: Bryan Cantwell bcantw...@firescope.com
To: mysql@lists.mysql.com
Sent: Tuesday, July 06, 2010 6:41 PM
Subject: combined or single indexes?
Is there a benefit to a combined index on a table
On Fri, Jul 9, 2010 at 7:30 AM, Neil Tompkins
neil.tompk...@googlemail.comwrote:
Should we be looking to create a index for all fields that we might be
perform a select condition in a where clause for ?
It's a bit of trial and error, you have to weight the number of times you
select based on
Is there a benefit to a combined index on a table? Or is multiple single
column indexes better?
If I have table 'foo' with columns a, b, and c. I will have a query
like:
select c from foo where a in (1,2,3) and b 12345;
Is index on a,b better in any way than an a index and a b index?
An explain
Hi Bryan, all!
Bryan Cantwell wrote:
Is there a benefit to a combined index on a table? Or is multiple single
column indexes better?
This is a FAQ, but I'm not aware of a place to point you for the answer.
If I have table 'foo' with columns a, b, and c. I will have a query
like:
select
only the index,
without getting data from the table.
--
Octavian
- Original Message -
From: Bryan Cantwell bcantw...@firescope.com
To: mysql@lists.mysql.com
Sent: Tuesday, July 06, 2010 6:41 PM
Subject: combined or single indexes?
Is there a benefit to a combined index on a table
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