How to count for each zipcode from nested multiple select statement?

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For each zipcode, i want to display the count of bookings which is count of bookings = (Number of times the location is a pickup location) +
(Number of times the location is a final destination) +
(Number of times the location is an intermediate destination point) which i already union the select statements and group by. But the results shown are not correct, for each zipcode the result of the count is the same for all zipcode.

My code:

SQL

select l.zip_code,sum(dum.tab) from location l,
(select  count(  Pickup_location) as tab from booking b,location l where b.pickup_location = l.Zip_Code  group by l.zip_Code 
union select count( destination) as tab from booking_destinations bd inner join location l on bd.destination = l.Zip_Code where bd.sequence in(1,2,3) group by l.zip_Code 
union select count( destination) as tab from booking_destinations bd,location l where bd.destination = l.Zip_Code and sequence = 4   group by l.zip_Code 
 ) as dum group by l.zip_Code ;

What I have tried:

searching online and removing group by from inner select statement

Posted 25-Mar-16 4:56am

Angel17033

Updated 25-Mar-16 13:16pm

Jörgen Andersson

v2

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Jörgen Andersson · Answer 1 · 2016-03-25T13:16:00

SQL

SELECT  zip_code
       ,sum(tab)
FROM    (
    SELECT  Count(Pickup_location) AS tab
           ,l.zipcode
    FROM    booking b
    INNER JOIN location l
        ON  b.pickup_location = l.Zip_Code
    GROUP BY l.zip_Code
    UNION
    SELECT  Count(destination) AS tab
           ,l.zipcode
    FROM    booking_destinations bd
    INNER JOIN location l
        ON  bd.destination = l.Zip_Code
    WHERE   bd.SEQUENCE IN(1,2,3,4)
    GROUP BY l.zip_Code 
 ) as dum
GROUP BY zip_Code;