DELIMITER $$   DROP PROCEDURE IF EXISTS HelloWorld$$
CREATE PROCEDURE HelloWorld()
BEGIN   SELECT "Hello World!";
END$$   DELIMITER ;

DECLARE counter INT DEFAULT 0;
SET counter = counter+1;  

CREATE PROCEDURE test(a INT, OUT b FLOAT, INOUT c INT)  

DELIMITER $$   DROP PROCEDURE IF EXISTS discounted_price$$
CREATE PROCEDURE discunted_price(normal_price NUMERIC(8, 2), OUT discount_price NUMERIC(8, 2))
BEGIN   IF (normal_price > 500) THEN   SET discount_price = normal_price * .8;   ELSEIF (normal_price > 100) THEN   SET discount_price = normal_price * .9;   ELSE   SET discount_price = normal_price;   END IF;
END$$   DELIMITER ;  

DELIMITER $$   DROP PROCEDURE IF EXISTS simple_loop$$   CREATE PROCEDURE simple_loop(OUT counter INT)
BEGIN   SET counter = 0;   my_simple_loop: LOOP   SET counter = counter+1;   IF counter = 10 THEN   LEAVE my_simple_loop;   END IF;   END LOOP my_simple_loop;
END$$   DELIMITER ;  

DELIMITER $$   DROP PROCEDURE IF EXISTS simple_while$$   CREATE PROCEDURE simple_while(OUT counter INT)
BEGIN   SET counter = 0;   WHILE counter != 10 DO   SET counter = counter+1;   END WHILE;
END$$   DELIMITER ;  

DELIMITER $$   DROP PROCEDURE IF EXISTS simple_repeat$$   CREATE PROCEDURE simple_repeat(OUT counter INT)
BEGIN   SET counter = 0;   REPEAT   SET counter = counter+1;   UNTIL counter = 10 END REPEAT;
END$$   DELIMITER ; 

DECLARE total_sales NUMERIC(8, 2);
SELECT SUM(sale_value) INTO total_sales FROM sales WHERE customer_id=in_customer_id;  

DELIMITER $$   DROP PROCEDURE IF EXITS cursor_example$$
CREATE PROCEDURE cursor_example()   READS SQL DATA
BEGIN   DECLARE l_employee_id INT;   DECLARE l_salary NUMERIC(8,2);   DECLARE l_department_id INT;   DECLARE done INT DEFAULT 0;   DECLARE cur1 CURSOR FOR SELECT employee_id, salary, department_id FROM employees;   DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;   OPEN cur1;   emp_loop: LOOP   FETCH cur1 INTO l_employee_id, l_salary, l_department_id;   IF done=1 THEN   LEAVE emp_loop;   END IF;   END LOOP emp_loop;   CLOSE cur1;
END$$
DELIMITER ;  

DELIMITER $$
DROP PROCEDURE IF EXISTS sp_emps_in_dept$$
CREATE PROCEDURE sp_emps_in_dept(in_employee_id INT)
BEGIN   SELECT employee_id, surname, firstname, address1, address2, zipcode, date_of_birth FROM employees WHERE department_id=in_employee_id;
END$$   DELIMITER ;  

DELIMITER $$   DROP PROCEDURE IF EXITS sp_update_salary$$
CREATE PROCEDURE sp_update_salary(in_employee_id INT, in_new_salary NUMERIC(8,2))
BEGIN   IF in_new_salary < 5000 OR in_new_salary > 500000 THEN   SELECT "Illegal salary: salary must be between $5000 and $500, 000";   ELSE   UPDATE employees SET salary=in_new_salary WHERE employee_id=in_employee_id;   END IF:
END$$   DELIMITER ;  

DELIMITER $$   DROP PROCEDURE IF EXISTS call_example$$
CREATE PROCEDURE call_example(employee_id INT, employee_type VARCHAR(20))   NO SQL
BEGIN   DECLARE l_bonus_amount NUMERIC(8,2);   IF employee_type='MANAGER' THEN   CALL calc_manager_bonus(employee_id, l_bonus_amount);   ELSE   CALL calc_minion_bonus(employee_id, l_bonus_amount);   END IF;   CALL grant_bonus(employee_id, l_bonus_amount);
END$$
DELIMITER ;  

CREATE PROCEDURE putting_it_all_together(in_department_id INT)   MODIFIES SQL DATA
BEGIN   DECLARE l_employee_id INT;   DECLARE l_salary NUMERIC(8,2);   DECLARE l_department_id INT;   DECLARE l_new_salary NUMERIC(8,2);   DECLARE done INT DEFAULT 0;   DECLARE cur1 CURSOR FOR   SELECT employee_id, salary, department_id   FROM employees   WHERE department_id=in_department_id;   DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1;   CREATE TEMPORARY TABLE IF NOT EXISTS emp_raises   (employee_id INT, department_id INT, new_salary NUMERIC(8,2));   OPEN cur1;   emp_loop: LOOP   FETCH cur1 INTO l_employee_id, l_salary, l_department_id;   IF done=1 THEN    /* No more rows */  LEAVE emp_loop;   END IF;   CALL new_salary(1_employee_id, l_new_salary); /* Get new salary */  IF (l_new_salary <> l_salary) THEN  /* Salary changed */  UPDATE employees   SET salary=l_new_salary   WHERE employee_id=l_employee_id;   /* Keep track of changed salaries */  INSERT INTO emp_raises(employee_id, department_id, new_salary)   VALUES (l_employee_id, l_department_id, l_new_salary);   END IF:   END LOOP emp_loop;   CLOSE cur1;   /* Print out the changed salaries */  SELECT employee_id, department_id, new_salary from emp_raises   ORDER BY employee_id;
END;  

CREATE   [DEFINER = { user | CURRENT_USER }]   PROCEDURE sp_name ([proc_parameter[,...]])   [characteristic ...] routine_body   CREATE   [DEFINER = { user | CURRENT_USER }]   FUNCTION sp_name ([func_parameter[,...]])   RETURNS type   [characteristic ...] routine_body   proc_parameter:   [ IN | OUT | INOUT ] param_name type   func_parameter:   param_name type   type:   Any valid MySQL data type   characteristic:   LANGUAGE SQL   | [NOT] DETERMINISTIC   | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }   | SQL SECURITY { DEFINER | INVOKER }   | COMMENT 'string'  routine_body:   Valid SQL procedure statement  

DELIMITER $$   DROP FUNCTION IF EXISTS f_discount_price$$
CREATE FUNCTION f_discount_price   (normal_price NUMERIC(8,2))   RETURNS NUMERIC(8,2)   DETERMINISTIC
BEGIN   DECLARE discount_price NUMERIC(8,2);   IF (normal_price > 500) THEN   SET discount_price = normal_price * .8;   ELSEIF (normal_price >100) THEN   SET discount_price = normal_price * .9;   ELSE   SET discount_price = normal_price;   END IF;   RETURN(discount_price);
END$$   DELIMITER ;  

DELIMITER $$   DROP TRIGGER sales_trigger$$
CREATE TRIGGER sales_trigger   BEFORE INSERT ON sales   FOR EACH ROW
BEGIN   IF NEW.sale_value > 500 THEN   SET NEW.free_shipping = 'Y';   ELSE   SET NEW.free_shipping = 'N';   END IF;   IF NEW.sale_value > 1000 THEN   SET NEW.discount = NEW.sale_value * .15;   ELSE   SET NEW.discount = 0;   END IF;
END$$   DELIMITER ;