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mySQL Query and order by highest number and grab highest result


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Hey Guys,

 

  I have a massive DB and want to search one of the fields titled site_id.  I want to search the field for the highest number and then assign that number to a variable.  This way I can have PHP add 1 to the variable and then insert it into a new field.  The whole point of this is to get around the limit of 1 auto increment per table.  Does anyone have any suggestions.

 

Thanks Guys

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