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Re: order by primary key slowly
Posted by: varky chan
Date: April 07, 2016 12:34AM

Yes, i know that it is slow down when m > 1M with limit m,n. But my question is, why 'select ID from user order by ID limit m,n' slower than 'select ID from user limit m,n' so much. Because id is primary key, it should take the same time.

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