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07.11.2008 at 11:49AM PDT, ID: 23558266 | Points: 500
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db query syntax question

Asked by ioustinos_sarris in PHP and Databases

Hi there,
I have a table which consists of
id
X
Y

Given the X and Y (of a place) and radius i can get all the records within a certain distance with this query.

How can i achieve the same (optimized in speed) given only the id of a place.

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$sql_get_collisions = "SELECT 
							id,
							(((acos(sin((".$Y."*pi()/180)) * sin((`Y`*pi()/180))+cos((".$Y."*pi()/180)) * cos((`Y`*pi()/180)) * cos(((".$X."- `X`)*pi()/180)))*180/pi())*60*1.1515*1.609344) as distance
							 
					FROM ".PLACES." 
					HAVING distance <= '".$this->radius."'";
[+][-]07.11.2008 at 11:57AM PDT, ID: 21984990

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[+][-]07.11.2008 at 12:11PM PDT, ID: 21985118

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20081112-EE-VQP-44 / EE_QW_2_20070628