Hi,
LIMIT takes the first X records, so there are no statistical guarantees.
SAMPLE takes X% of the records from the whole bag (uniformly), so you have
statistical guarantees.
No, SAMPLE does not use reservoir sampling.

Cheers,

--
Gianmarco
On Wed, Feb 27, 2013 at 12:23 AM, Prasanth J <[EMAIL PROTECTED]>wrote:
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