Several of my DISTINCT searches are frequently showing up in the slow query
log. These queries use multiple table joins. Using EXPLAIN shows that the
queries are using the appropriate keys, as far as I know. Are DISTINCT
searches using multiple joins slow?
TIA.
Stephen P. Fracek, Jr.
[EMAIL
. Fracek, Jr. [mailto:[EMAIL PROTECTED]
Sent: Monday, May 01, 2006 7:52 AM
To: mysql@lists.mysql.com
Subject: Optimizing DISTINCT searches
Several of my DISTINCT searches are frequently showing up in the slow
query log. These queries use multiple table joins. Using EXPLAIN shows
that the queries
On 2006-05-01 11:55 AM, Robert DiFalco [EMAIL PROTECTED] wrote:
Well, normally a DISTINCT has to do a type of sort and is slower than
non-DISTINCT queries. Each field of the result set is considered in the
DISTINCT logic. Can you modify the query so that it does not require the
DISTINCT? Can
@lists.mysql.com
Subject: FW: Optimizing DISTINCT searches
On 2006-05-01 11:55 AM, Robert DiFalco [EMAIL PROTECTED] wrote:
Well, normally a DISTINCT has to do a type of sort and is slower than
non-DISTINCT queries. Each field of the result set is considered in
the DISTINCT logic. Can you modify
On 2006-05-01 1:14 PM, Robert DiFalco [EMAIL PROTECTED] wrote:
Would you need the DISTINCT if you change the query like so?
SELECT Site.Site_ID, Site, Status, Type
FROM Site
JOIN Project ON Site.Site_ID = Project.Site_ID
ORDER BY Site;
You may also want to just try your initial query
, 2006 1:27 PM
To: mysql@lists.mysql.com
Subject: Re: Optimizing DISTINCT searches
On 2006-05-01 1:14 PM, Robert DiFalco [EMAIL PROTECTED] wrote:
Would you need the DISTINCT if you change the query like so?
SELECT Site.Site_ID, Site, Status, Type FROM Site JOIN Project ON
Site.Site_ID
