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    ReQL command: sum

    Command syntax

    sequence.sum([field | function]) → number

    r.sum(sequence, [field | function]) → number

    Description

    Sums all the elements of a sequence. If called with a field name, sums all the values of that field in the sequence, skipping elements of the sequence that lack that field. If called with a function, calls that function on every element of the sequence and sums the results, skipping elements of the sequence where that function returns nil or a non-existence error.

    Returns 0 when called on an empty sequence.

    Example: What’s 3 + 5 + 7?

    r([3, 5, 7]).sum().run(conn)
    

    Example: How many points have been scored across all games?

    r.table('games').sum('points').run(conn)
    

    Example: How many points have been scored across all games, counting bonus points?

    r.table('games').sum{|game| game['points'] + game['bonus_points']}.run(conn)
    

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