Among the orders shipped in November, 1998 by air, how many orders were urgent?
orders shipped in November, 1998 refer to o_orderkey where l_shipdate LIKE '1998-11-%'; by air refers to l_shipmode = 'AIR'; the order is urgent if o_orderpriority = '1-URGENT' ;
SELECT COUNT(T1.o_orderkey) FROM orders AS T1 INNER JOIN lineitem AS T2 ON T1.o_orderkey = T2.l_orderkey WHERE T2.l_shipmode = 'AIR' AND T1.o_orderpriority = '1-URGENT' AND SUBSTR(T2.l_shipdate, 1, 7) = '1998-11'