Question

Performing calculations on decimal type for latitude, longitude type values

Asked by: alex_wareing

I have a MySQL table that contains columns fro longitude and latitude values in the decimal 9,7 format. I want to search the rows to find records where long and lat values are between certain values. I have tried the code below but its returning no results when there are matching values. How can i make the calculation on the decimal type?

SELECT geonameid, name, latitude, longitude 
FROM geoname WHERE (latitude >= 50.00 AND latitude <= 52.00 AND longitude >= 1.0 AND longitude <= -1.0)

                                  
1:
2:

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Asked On
2009-08-24 at 08:25:27ID24676867
Topics

SQL Query Syntax

,

MySQL Server

Participating Experts
3
Points
500
Comments
9

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Answers

 

by: andycroftsPosted on 2009-08-24 at 08:27:14ID: 25169298


I think you mean

SELECT geonameid, name, latitude, longitude
 2:  FROM geoname WHERE (latitude >= 50.00 AND latitude <= 52.00 AND longitude <= 1.0 AND longitude >= -1.0)




~

 

by: andycroftsPosted on 2009-08-24 at 08:28:39ID: 25169317

you had longitude greater than 1 and longitude less than -1

 

by: shru_0409Posted on 2009-08-24 at 08:40:39ID: 25169434

SELECT geonameid, name, latitude, longitude
FROM geoname WHERE (format(latitude,2) >= 50.00 AND format(latitude,2) <= 52.00 AND format(longitude,1) >= 1.0 AND format(longitude,1) <= -1.0)

for more help check this link

http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_format

 

by: alex_wareingPosted on 2009-08-24 at 09:19:01ID: 25169842

I couldn't get any of your suggestions to work, still no results. Here is the latest version of my SQL:

SELECT geonameid, name, latitude, longitude 
FROM geoname WHERE (format(latitude,2) >= 51.00 AND format(latitude,2) <= 52.00 AND format(longitude,1) >= 0.5 AND format(longitude,1) <= -0.5)

                                              
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by: hieloPosted on 2009-08-24 at 10:01:41ID: 25170235

try:

SELECT geonameid, name, latitude, longitude 
FROM geoname WHERE (format(latitude,2) >= 51.00 AND format(latitude,2) <= 52.00 AND format(longitude,1) >= -0.5 AND format(longitude,1) <= 0.5)

                                              
1:
2:

Select allOpen in new window

 

by: andycroftsPosted on 2009-08-24 at 12:46:53ID: 25171742

format(longitude,1) >= 0.5 AND format(longitude,1) <= -0.5)

you still have this wrong should be <= 0.5 and >= -0.5

if it is greater than 0.5 or 1.0 it can' ALSO be less than -0.5 or - 1.0

see here

 

by: andycroftsPosted on 2009-08-24 at 12:47:14ID: 25171750

can't

 

by: shru_0409Posted on 2009-08-24 at 22:58:13ID: 25174823

SELECT geonameid, NAME, latitude, longitude
  FROM geoname
 WHERE (format(latitude, 2) >= 51.00 AND format(latitude, 2) <= 52.00)
    OR (format(longitude, 1) >= 0.5 AND format(longitude, 1) <= -0.5)

try this

 

by: andycroftsPosted on 2009-08-25 at 11:45:33ID: 25180807

Thanks

20120131-EE-VQP-002

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