URI Problem 2737 Solution Lawyers - URI Online Judge Solution

URI Online Judge Solution 2737 Lawyers Using PostgreSQL Query Language.

The manager of Mangojata Lawyers requested a report on the current lawyers.

The manager wants you to show him the name of the lawyer with the most clients, the one with the fewest and the client average considering all lawyers.

OBS: Before presenting the average, show a field called Average to make the report more readable. The average must be presented as an integer.

Schema

lawyers
Column	Type
register (PK)	integer
name	varchar
customers_number	integer

Tables

lawyers
register	name	customers_number
1648	Marty M. Harrison	5
2427	Jonathan J. Blevins	15
3365	Chelsey D. Sanders	20
4153	Dorothy W. Ford	16
5525	Penny J. Cormier	6

Output Sample

name	customers_number
Chelsey D. Sanders	20
Marty M. Harrison	5
Average	12

URI 2737 Solution in PostgreSQL:


SELECT name, customers_number 
FROM Lawyers
WHERE customers_number = (SELECT MAX(customers_number) FROM Lawyers)
UNION ALL
SELECT name, customers_number 
FROM Lawyers
WHERE customers_number = (SELECT MIN(customers_number) FROM Lawyers)
UNION ALL
SELECT 'Average'as name,cast(avg(customers_number)as int)as customers_number FROM lawyers

Comments

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