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SQL Exercise 2

Tony Tony Follow Jan 19, 2020 · 1 min read
SQL Exercise 2
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Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number of characters in the name). If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically.

Input Format

The STATION table is described as follows:

Filed Type
ID NUMBER
NAME VARCHAR2(17)
COUNTRYCODE VARCHAR2(3)
DISTRICT VARCHAR2(20)
POPULATION NUMBER

where LAT_N is the northern latitude and LONG_W is the western longitude.

Sample Input

Let’s say that CITY only has four entries: DEF, ABC, PQRS and WXY

Sample Output

ABC 3
PQRS 4

Explanation

When ordered alphabetically, the CITY names are listed as ABC, DEF, PQRS, and WXY, with the respective lengths and . The longest-named city is obviously PQRS, but there are options for shortest-named city; we choose ABC, because it comes first alphabetically.

Note

You can write two separate queries to get the desired output. It need not be a single query.

ANS

SELECT CITY,LENGTH(CITY)
FROM STATION
WHERE LENGTH(CITY)=(SELECT MAX(LENGTH(CITY)) FROM STATION)
LIMIT 1;

SELECT CITY,LENGTH(CITY)
FROM STATION
WHERE LENGTH(CITY)=(SELECT MIN(LENGTH(CITY)) FROM STATION)
LIMIT 1
ORDER BY CITY;

Expected Output

Amo 3
Marine On Saint Croix 21
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Tony
Written by Tony Follow
Hi, I am Tony, the author of Learning Journey blog. I hope you like what I sharing!