add files

Author: kristian9577

14.Functions and Procedures - Exercise/exercises.sql

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+-- 1.	Employees with Salary Above 35000
+
+DELIMITER $$
+CREATE PROCEDURE usp_get_employees_salary_above_35000 ()
+BEGIN 
+	SELECT e.first_name,e.last_name 
+	FROM employees AS e
+	WHERE salary > 35000
+	ORDER BY e.first_name,e.last_name,e.employee_id;
+END $$
+
+CALL usp_get_employees_salary_above_35000();
+
+-- 2.	Employees with Salary Above Number
+
+DELIMITER $$
+CREATE PROCEDURE usp_get_employees_salary_above(min_salary DOUBLE)
+BEGIN
+	SELECT e.first_name,e.last_name 
+	FROM employees AS e
+	WHERE e.salary >= min_salary
+	ORDER BY e.first_name,e.last_name,e.employee_id;
+END $$
+
+CALL usp_get_employees_salary_above(48100);
+
+-- 3.	Town Names Starting With
+
+DELIMITER $$
+CREATE PROCEDURE usp_get_towns_starting_with(str_start VARCHAR(10))
+BEGIN
+	SELECT name AS town_name
+    FROM towns 
+    WHERE name LIKE CONCAT(str_start,'%') 
+    ORDER BY town_name;
+END $$
+
+CALL usp_get_towns_starting_with('b');
+
+-- 4.	Employees from Town
+
+DELIMITER $$
+CREATE PROCEDURE usp_get_employees_from_town (town_names VARCHAR(45))
+BEGIN
+	SELECT e.first_name,e.last_name 
+	FROM employees AS e
+	JOIN addresses AS a ON  a.address_id=e.address_id
+    JOIN towns AS t ON t.town_id = a.town_id
+    WHERE t.name = town_names
+  	ORDER BY e.first_name,e.last_name,e.employee_id;
+END $$
+
+CALL usp_get_employees_from_town('Sofia');
+
+-- 5.	Salary Level Function
+
+DELIMITER $$
+CREATE FUNCTION ufn_get_salary_level(input_salary DOUBLE)
+RETURNS VARCHAR(10)
+DETERMINISTIC
+BEGIN
+	DECLARE result VARCHAR(10);
+	RETURN CASE
+    WHEN input_salary < 30000 THEN 'low'
+    WHEN input_salary >= 30000 AND input_salary <= 50000 THEN  'average'
+    WHEN input_salary > 50000 THEN 'high'
+    END;
+END$$
+
+SELECT ufn_get_salary_level(13500.00);
+
+-- 6.	Employees by Salary Level
+DELIMITER $$
+CREATE PROCEDURE usp_get_employees_by_salary_level(salary_level VARCHAR(10))
+BEGIN 
+	SELECT first_name,last_name FROM employees
+	WHERE
+	CASE
+	WHEN salary < 30000 THEN 'Low'
+	WHEN salary >= 30000 AND salary <= 50000 THEN 'Average'
+	WHEN salary > 50000 THEN 'High'
+	END = salary_level
+    ORDER BY first_name,last_name DESC;
+END$$
+
+CALL usp_get_employees_by_salary_level('high');
+
+-- 7.	Define Function
+
+DELIMITER $$
+CREATE FUNCTION ufn_is_word_comprised(set_of_letters VARCHAR(50),word varchar(50))
+RETURNS BIT
+DETERMINISTIC
+BEGIN
+RETURN IF(LOWER(word) REGEXP CONCAT('^[', LOWER(set_of_letters), ']+$'), TRUE, FALSE);
+END $$
+
+SELECT ufn_is_word_comprised('oistmiahf','Sofia');