MySQL: Selecting One Record When Others Have Same Data

Posted by LoganFrederick on Stack Overflow See other posts from Stack Overflow or by LoganFrederick
Published on 2009-07-08T16:22:46Z Indexed on 2010/03/09 6:06 UTC
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mysql

I have a table of cities that all share the same area code:

367 01451	Harvard	        Worcester	Massachusetts	MA	978	Eastern
368 01452	Hubbardston	Worcester	Massachusetts	MA	978	Eastern
369 01453	Leominster	Worcester	Massachusetts	MA	978	Eastern

The table has multiple area codes, all with multiple cities.

What I'd like to do is only select one city from each area code and delete any extra cities from duplicate area codes. What would be the best query to accomplish this?

I believe: http://stackoverflow.com/questions/596629/mysql4-sql-for-selecting-one-or-zero-record

Is coming close to what I need but didn't quite get what/how those answers were working.

Note The "978" row is the "area_code" row, table name is "zip_code".

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MySQL: Selecting One Record When Others Have Same Data - Developer IT

MySQL: Selecting One Record When Others Have Same Data

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