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In this post, you will find the solution for Occupations in SQL-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.
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Introduction To SQL
SQL stands for Structured Query Language. SQL is used to create, remove, alter the database and database objects in a database management system and to store, retrieve, update the data in a database. SQL is a standard language for creating, accessing, manipulating database management system. SQL works for all modern relational database management systems, like SQL Server, Oracle, MySQL, etc.
- It is a standard language for Relational Database System. It enables a user to create, read, update and delete relational databases and tables.
- All the RDBMS like MySQL, Informix, Oracle, MS Access and SQL Server use SQL as their standard database language.
- SQL allows users to query the database in a number of ways, using English-like statements.
Link for the Problem – Occupations SQL – Hacker Rank Solution
Occupations SQL – Hacker Rank Solution
Problem:
Write a query that prints a list of employee names (i.e.: the name attribute) from the Employee table in alphabetical order.
Input Format
The Employee table containing employee data for a company is described as follows:

where employee_id is an employee’s ID number, name is their name, months is the total number of months they’ve been working for the company, and salary is their monthly salary.
Sample Input

Sample Output
Angela Bonnie Frank Joe Kimberly Lisa Michael Patrick Rose Todd
Occupations SQL – Hacker Rank Solution
set @d=0, @p=0, @s=0, @a=0; select min(Doctor), min(Professor), min(Singer), min(Actor) from( select case when Occupation='Doctor' then (@d:=@d+1) when Occupation='Professor' then (@p:=@p+1) when Occupation='Singer' then (@s:=@s+1) when Occupation='Actor' then (@a:=@a+1) end as Row, case when Occupation='Doctor' then Name end as Doctor, case when Occupation='Professor' then Name end as Professor, case when Occupation='Singer' then Name end as Singer, case when Occupation='Actor' then Name end as Actor from OCCUPATIONS order by Name ) as temp group by Row;
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