SQL Stored Procedure

Procedure to Generate Prime Numbers

Definition

`sql DELIMITER $$

CREATE PROCEDURE prime(I INT) BEGIN SET @a = I; -- Upper limit for prime number generation SET @b = 1; -- Starting number SET @prime = ''; -- String to store prime numbers

-- Loop through numbers from 1 to I
WHILE @b <= @a DO
    SET @c = 0; -- Counter for divisors
    SET @d = 1; -- Starting divisor

    -- Check divisors of @b
    WHILE @d <= @b DO
        IF @b % @d = 0 THEN 
            SET @c = @c + 1; -- Increase divisor count
        END IF;
        SET @d = @d + 1; -- Next divisor
    END WHILE;

    -- If @b is prime (exactly 2 divisors)
    IF @c = 2 THEN
        IF @prime != '' THEN 
            SET @prime = CONCAT(@prime, '&', @b); -- Append prime number to string
        ELSE
            SET @prime = @b; -- Initialize the string with the first prime
        END IF;
    END IF;

    SET @b = @b + 1; -- Next number
END WHILE;

SELECT @prime; -- Return the string of prime numbers

END $$

DELIMITER ;

-- Call the procedure with an input value CALL prime(1000);