2.null


#1



SELECT COUNT(*) FROM flights
WHERE arr_time IS NOT NULL
AND destination is ATL;


#2

try destination = 'ATL'


#3

select count (*) from flights
where arr_time is not null
and destination = 'ALT';

I tried the code above but still doesn't work


#4

I got ATL and ALT incorrect, here is the code that works:

select count (destination) from flights
where arr_time is not null
and destination = 'ATL';


#5

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