```sql

drop table if exists t ;
drop table if exists temp ;

CREATE TABLE t
(
    game String,
    round String,
    casino Int32)
ENGINE = MergeTree() ORDER BY (casino, game, round);

CREATE TABLE temp
(
    game String,
    round String,
    casino Int32)
ENGINE = MergeTree() ORDER BY (casino, game, round);

insert into t(casino, game, round)
select number%103, toString(cityHash64(number%999)), toString(number) from numbers(3, 50000000);

insert into temp(casino, game, round)
select number%103, toString(cityHash64(number%999)), toString(number) from numbers(5000);

Q1: SELECT count(*)
FROM temp WHERE (casino, game, round) NOT IN
(     SELECT  casino, game, round
    FROM t
    WHERE (casino, game, round) IN
    (
        SELECT casino, game, round
        FROM temp
    )
)

21.3.1.5944  Elapsed: 4.464 sec. Processed 5.00 thousand rows, 225.89 KB (1.12 thousand rows/s., 50.60 KB/s.)

20.8.11.17    Elapsed: 0.611 sec. Processed 5.00 thousand rows, 225.89 KB (8.18 thousand rows/s., 369.73 KB/s.)

18.14.19.    Elapsed: 0.341 sec. Processed 5.00 thousand rows, 225.89 KB (14.66 thousand rows/s., 662.46 KB/s.)

```
{
        finished_processing = true;
        
        queue.clear();
    }
protected:
    void consume(Chunk chunk) override
    {
        if (!finished_processing)
            queue.emplace(std::move(chunk));
    }
    void consumeTotals(Chunk chunk) override { totals = std::move(chunk); }
    void consumeExtremes(Chunk chunk) override { extremes = std::move(chunk); }
    void finalize() override
    {
        finished_processing = true;
        
        queue.emplace(Chunk());
    }
private:
    ConcurrentBoundedQueue<Chunk> queue;
    Chunk totals;
    Chunk extremes;
    
    static WriteBuffer out;
    BlockStreamProfileInfo info;
    std::atomic<bool> finished_processing;
};
}