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$max (aggregation)
¶
$max
¶
Returns the highest value among all values of the field in all documents selected by this group.
< $match (aggregation)
/\ 参考
$min (aggregation) >
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$hour (aggregation)
$ifNull (aggregation)
$last (aggregation)
$limit (aggregation)
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$match (aggregation)
$max (aggregation)
$min (aggregation)
$minute (aggregation)
$mod (aggregation)
$month (aggregation)
$multiply (aggregation)
$ne (aggregation)
$not (aggregation)
$or (aggregation)
$project (aggregation)
$push (aggregation)
$second (aggregation)
$skip (aggregation)
$sort (aggregation)
$strcasecmp (aggregation)
$substr (aggregation)
$subtract (aggregation)
$sum (aggregation)
$toLower (aggregation)
$toUpper (aggregation)
$unwind (aggregation)
$week (aggregation)
$year (aggregation)
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