Question

I have a query which i am unable to get the output.
Below is the query to be executed

Q: 2. Write a query to find the city Name, Id and Count that has got maximum number of vehicles associated.

Now, Given is the one table on which the query should be executed.

Vehicle_Detail_ID   City_ID
56                    242
57                    242
58                    242
59                    243
60                    241
61                    242
62                    245

Another table which has the city name

City_ID City_Name
242          Bangalore
243          ChamarajNager
241          Bellary
245          Chitradurga

EXPECTED OUTPUT:

City_ID No_Vehicles
242          4

Please tell me how to write the query which fetches me the right output.

Given below is the query which gives the city Id and its vehicle count.
TRIED:

SELECT c.city_id, COUNT(c.City_ID) AS NO_vehicles
  FROM city c, vehicle_details v 
 WHERE c.City_ID = v.City_ID
 GROUP BY c.City_ID

ACTUAL OUTPUT

City_ID No_Vehicles
242             4
243             1
241             1
245             1

Please help me to get max of these as shown in EXPECTED OUTPUT.

Answer 1

CREATE TABLE V_ddetails(Vehicle_Detail_ID int,City_ID int)
INSERT INTO V_ddetails 
VALUES(56,242),(57,242),(58,242),(59,243),(60, 241),(61,242),(62,245)

CREATE TABLE city(City_ID int, City_Name varchar(50))

INSERT INTO city
VALUES(242,'Bangalore'),(243,'ChamarajNager'),(241,'Bellary'),(245,'Chitradurga')

select top 1 v.City_ID,COUNT(*) as No_Vehicles from V_ddetails v inner join city c
on v.City_ID =c.City_ID 
group by v.City_ID 
order by No_Vehicles desc