The PADS SQl Hacker Rank Solution

Hello coders, In this post, you will learn how to solve the The PADS SQl Hacker Rank Solution. This problem is a part of the SQL Hacker Rank series.

Problem

Generate the following two result sets:

1. Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession as a parenthetical (i.e.: enclosed in parentheses). For example: AnActorName(A), ADoctorName(D), AProfessorName(P), and ASingerName(S).
2. Query the number of ocurrences of each occupation in OCCUPATIONS. Sort the occurrences in ascending order, and output them in the following format:
   There are a total of [occupation_count] [occupation]s. where [occupation_count] is the number of occurrences of an occupation in OCCUPATIONS and [occupation] is the lowercase occupation name. If more than one Occupation has the same [occupation_count], they should be ordered alphabetically.

Note: There will be at least two entries in the table for each type of occupation.

Input Format

The OCCUPATIONS table is described as follows:  Occupation will only contain one of the following values: Doctor, Professor, Singer or Actor.

Sample Input

An OCCUPATIONS table that contains the following records:

Sample Output

Ashely(P)
Christeen(P)
Jane(A)
Jenny(D)
Julia(A)
Ketty(P)
Maria(A)
Meera(S)
Priya(S)
Samantha(D)
There are a total of 2 doctors.
There are a total of 2 singers.
There are a total of 3 actors.
There are a total of 3 professors.

The PADS SQL Hacker Rank Solution

SELECT X, Y FROM FUNCTIONS F1
    WHERE EXISTS(SELECT * FROM FUNCTIONS F2 WHERE F2.Y = F1.X
    AND F2.X = F1.Y AND F2.X > F1.X) AND (X != Y)
UNION
SELECT X,Y FROM FUNCTIONS F1 WHERE X = Y AND
    ((SELECT COUNT(*) FROM FUNCTIONS WHERE X = F1.X AND Y = F1.X) > 1)
      ORDER BY X;

Disclaimer: The above Problem (The PADS) generated by Hackerrank but the Solution is Provided by Chase2Learn. This tutorial is only for Educational and Learning purposes.