Now let's say you want to find the city for each company based on their telephone area code. In this case, you can run a query like this.

现在，假设希望根据每家公司的电话区号找到它们所在的城市。

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"He said he was calling from Miranshah in North Waziristan and the telephone number used to make the call carried an area code common to the Waziristan tribal area and Bannu, the adjoining district in the North West Frontier Province, " the paper said.

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So Nynex, hardly the most popular local telephone company in America, knew it was in for a scrap when it recently unveiled a plan to deprive some Manhattanites of their treasured 212 area code--arguably the only local telephone code that is recognised from Tokyo to Tomsk.

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