Comments on: Mysql function to find distance between two places using lat/long http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/ Fri, 03 Feb 2012 12:09:44 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Imran http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5683 Imran Tue, 17 Jan 2012 04:13:21 +0000 http://www.imranulhoque.com/?p=89#comment-5683 Do not ignore the warning. Better you should change the distance to DECIMAL(18,12) otherwise it may return some distorted result. I have updated the function, please update it. Thanks for pointing it out. Do not ignore the warning. Better you should change the distance to DECIMAL(18,12) otherwise it may return some distorted result.

I have updated the function, please update it. Thanks for pointing it out.

]]> By: Stephen http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5682 Stephen Mon, 16 Jan 2012 22:59:51 +0000 http://www.imranulhoque.com/?p=89#comment-5682 The code function works great for me. The only problem is that I am getting the following warning: Data truncated for column 'distance' at row X where X is the row number. It appears that the variable distance is being truncated because it is too large for type DECIMAL(12,8). I am wondering if I should turn the warnings off or make a change to DECIMAL. The code function works great for me. The only problem is that I am getting the following warning:

Data truncated for column ‘distance’ at row X

where X is the row number. It appears that the variable distance is being truncated because it is too large for type DECIMAL(12,8). I am wondering if I should turn the warnings off or make a change to DECIMAL.

]]> By: Imran http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5674 Imran Sat, 10 Dec 2011 02:01:56 +0000 http://www.imranulhoque.com/?p=89#comment-5674 In your query, select ZipCode from zip where GetDistance("10.1357002, 49.9225563, 0", ( <strong>select concat_ws(’, ’, Longitude, Latitude, ’0’) from zip</strong> )) <= 40; you can see it can return multiple results as there is no condition to limit the number of result to be one. Try the following if that helps: <blockquote>select ZipCode from zip where GetDistance("10.1357002, 49.9225563, 0", concat_ws(’, ’, Longitude, Latitude, ’0’)) <= 40;</blockquote> Thanks Imran In your query,

select ZipCode from zip where GetDistance(“10.1357002, 49.9225563, 0″, ( select concat_ws(’, ’, Longitude, Latitude, ’0’) from zip )) <= 40;

you can see it can return multiple results as there is no condition to limit the number of result to be one. Try the following if that helps:

select ZipCode from zip where GetDistance(“10.1357002, 49.9225563, 0″, concat_ws(’, ’, Longitude, Latitude, ’0’)) <= 40;

Thanks
Imran

]]> By: Stephen http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5672 Stephen Fri, 09 Dec 2011 15:01:28 +0000 http://www.imranulhoque.com/?p=89#comment-5672 Imran, I am trying to use a non-scalar value for the value of \"coordinates\" in your example above, and it is not working. How do you use the function in a query of a table where \"coordinates\" is a non-scalar query? My query is below: mysql> select ZipCode from zip where GetDistance(\"10.1357002, 49.9225563, 0\", (select concat_ws(\', \', Longitude, Latitude, \'0\') from zip)) <= 40; ERROR 1242 (21000): Subquery returns more than 1 row Imran,

I am trying to use a non-scalar value for the value of \"coordinates\" in your example above, and it is not working. How do you use the function in a query of a table where \"coordinates\" is a non-scalar query? My query is below:

mysql> select ZipCode from zip where GetDistance(\"10.1357002, 49.9225563, 0\", (select concat_ws(\’, \’, Longitude, Latitude, \’0\’) from zip)) <= 40;
ERROR 1242 (21000): Subquery returns more than 1 row

]]> By: Stephen http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5671 Stephen Fri, 09 Dec 2011 15:00:59 +0000 http://www.imranulhoque.com/?p=89#comment-5671 Imran, I am trying to use a non-scalar value for the value of "coordinates" in your example above, and it is not working. How do you use the function in a query of a table where "coordinates" is a non-scalar query? My query is below: mysql> select ZipCode from zip where GetDistance("10.1357002, 49.9225563, 0", (select concat_ws(', ', Longitude, Latitude, '0') from zip)) <= 40; ERROR 1242 (21000): Subquery returns more than 1 row Imran,

I am trying to use a non-scalar value for the value of “coordinates” in your example above, and it is not working. How do you use the function in a query of a table where “coordinates” is a non-scalar query? My query is below:

mysql> select ZipCode from zip where GetDistance(“10.1357002, 49.9225563, 0″, (select concat_ws(‘, ‘, Longitude, Latitude, ‘0′) from zip)) <= 40;
ERROR 1242 (21000): Subquery returns more than 1 row

]]> By: review http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5667 review Wed, 30 Nov 2011 22:19:22 +0000 http://www.imranulhoque.com/?p=89#comment-5667 <strong>review...</strong> [...]Mysql function to find distance between two places using lat/long « imranul hoque's blog[...]... review…

[...]Mysql function to find distance between two places using lat/long « imranul hoque's blog[...]…

]]> By: Mike http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5635 Mike Tue, 24 May 2011 13:52:29 +0000 http://www.imranulhoque.com/?p=89#comment-5635 Imran, I tried your function and tested it against a couple of online tools and found that if I run the function on 2 points ("33.745,-84.389,0", "34.037,-84.576,0") I get 13.06459190 miles. Which is off by about 10 miles based on other online tools (including gmaps). However, when I pull out your query and run it outside of the function manually I get the correct distance: 22.8477833829375 miles. Wandering what's up but more importantly I prefer running the sql rather than the function so thanks for posting this. Imran, I tried your function and tested it against a couple of online tools and found that if I run the function on 2 points (“33.745,-84.389,0″, “34.037,-84.576,0″) I get 13.06459190 miles. Which is off by about 10 miles based on other online tools (including gmaps). However, when I pull out your query and run it outside of the function manually I get the correct distance: 22.8477833829375 miles. Wandering what’s up but more importantly I prefer running the sql rather than the function so thanks for posting this.

]]> By: Imran http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5603 Imran Wed, 23 Feb 2011 07:10:58 +0000 http://www.imranulhoque.com/?p=89#comment-5603 I have considered the lat/long as a varchar(120) field that contains lat/long as "10.1357002, 49.9225563, 0" format (the format google uses). I have considered the lat/long as a varchar(120) field that contains lat/long as “10.1357002, 49.9225563, 0″ format (the format google uses).

]]> By: Bill http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5602 Bill Wed, 23 Feb 2011 01:20:57 +0000 http://www.imranulhoque.com/?p=89#comment-5602 Imran, how are you storing the lat/long in `coordinates`? Imran, how are you storing the lat/long in `coordinates`?

]]> By: Imran http://www.imranulhoque.com/mysql/mysql-function-to-find-distance-between-two-places-using-latlong/comment-page-1/#comment-5585 Imran Mon, 10 Jan 2011 17:57:36 +0000 http://www.imranulhoque.com/?p=89#comment-5585 Thanks Paul for sharing. It will surely help others, Thanks Paul for sharing. It will surely help others,

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