|
[x]
Posted via EE Mobile
|
|
| Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again. |
|
|
|
|
|
[x]
The Solution Rating System
|
|
| With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating. - The Grade of the Solution
- The Zone Rank of the Expert Providing the Solution
- The Number of Author and Expert Comments
- The Number of Experts Contributing
- The Feedback of the Community
Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site. If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support. Thank you! |
|
|
|
|
Asked by AncientFrib in GIS & GPS Programming, Databases Miscellaneous, MySQL Server
Hello,
I am in need of an advanced query that will assist us with a project we are working on.
I will have a table (ROUTE table) containing a list of locations that a gps unit should visit in a single day. These records will have associated lat/lon coordinates.
Lastly, I will have a table (ACTUAL table) containing the actual lat/lon coordinates of a gps unit stored by date and time.
I need to query (I am told Spatial Operations will be necessary) the "ACTUAL" table for any records that are within 1/8 of a mile from ANY of the records in the "ROUTE" table.
If there ARE records that show the GPS unit within 1/8 of a mile I need to show what time it arrived, and if there AREN'T then I need to indicate that the GPS unit failed to arrive at that location.
How can I do this in such a way that it DOESN'T overload the DB and doesn't take forever to retrieve results? Thank you!
20090824-EE-VQP-74 - Hierarchy / EE_QW_3_20080625
