URI Problem 2738 Solution Contest - URI Online Judge Solution

URI Online Judge Solution 2738 Contest Using PostgreSQL Query Language.

The Mars Technology University has Open Positions for researchers. However, the computer responsible for processing the candidates' data is broken. You must present the candidate list, containing the name and final score (with two decimal places of precision) of each candidate. Remember to show the list ordered by score (highest first).

The score is given by the weighted average described as:

Schema

candidate
Column	Type
id (PK)	integer
name	varchar

score
Column	Type
candidate_id (FK)	integer
math	numeric
specific	numeric
project_plan	numeric

Tables

candidate
id	name
1	Michael P Cannon
2	Barbra J Cable
3	Ronald D Jones
4	Timothy K Fitzsimmons
5	Ivory B Morrison
6	Sheila R Denis
7	Edward C Durgan
8	William K Spencer
9	Donna D Pursley
10	Ann C Davis

score
candidate_id	math	specific	project_plan
1	76	58	21
2	4	5	22
3	15	59	12
4	41	42	99
5	22	90	9
6	82	77	15
7	82	99	56
8	11	4	22
9	16	29	94
10	1	7	59

Output Sample

name	avg
Edward C Durgan	74.10
Timothy K Fitzsimmons	70.30
Donna D Pursley	58.90
Sheila R Denis	47.00
Michael P Cannon	43.10
Ivory B Morrison	35.90
Ann C Davis	31.80
Ronald D Jones	26.70
William K Spencer	14.40
Barbra J Cable	13.30

URI 2738 Solution in PostgreSQL:


SELECT Candidate.name,ROUND(((Score.math*2) + (specific*3) + (project_plan*5))/10,2)  as avg
FROM Candidate
INNER JOIN Score
ON Candidate.id = Score.candidate_id
ORDER BY avg DESC

Comments

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