Print Prime Numbers in SQL | HackerRank Programming Solutions | HackerRank SQL Solutions

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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 – Print Prime Numbers SQL – Hacker Rank Solution

Print Prime Numbers SQL – Hacker Rank Solution

Problem:

Write a query to print all prime numbers less than or equal to 1000. Print your result on a single line, and use the ampersand (&) character as your separator (instead of a space).

For example, the output for all prime numbers  would be:

2&3&5&7

Print Prime Numbers SQL – Hacker Rank Solution

SELECT GROUP_CONCAT(NUMB SEPARATOR '&')
FROM (
    SELECT @num:[email protected]+1 as NUMB FROM
    information_schema.tables t1,
    information_schema.tables t2,
    (SELECT @num:=1) tmp
) tempNum
WHERE NUMB<=1000 AND NOT EXISTS(
		SELECT * FROM (
			SELECT @nu:[email protected]+1 as NUMA FROM
			    information_schema.tables t1,
			    information_schema.tables t2,
			    (SELECT @nu:=1) tmp1
			    LIMIT 1000
			) tatata
		WHERE FLOOR(NUMB/NUMA)=(NUMB/NUMA) AND NUMA<NUMB AND NUMA>1
	)