MySQL 5.7 create VIEW or FUNCTION or PROCEDURE

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1.视图

a.

sql;"> CREATE ALGORITHM = UNDEFINED DEFINER = `root`@`localhost` sql SECURITY INVOKER VIEW `sakila`.`actor_info` AS SELECT `a`.`actor_id` AS `actor_id`,`a`.`first_name` AS `first_name`,`a`.`last_name` AS `last_name`,GROUP_CONCAT(DISTINCT CONCAT(`c`.`name`,': ',(SELECT GROUP_CONCAT(`f`.`title` ORDER BY `f`.`title` ASC SEPARATOR ',') FROM ((`sakila`.`film` `f` JOIN `sakila`.`film_category` `fc` ON ((`f`.`film_id` = `fc`.`film_id`))) JOIN `sakila`.`film_actor` `fa` ON ((`f`.`film_id` = `fa`.`film_id`))) WHERE ((`fc`.`category_id` = `c`.`category_id`) AND (`fa`.`actor_id` = `a`.`actor_id`)))) ORDER BY `c`.`name` ASC SEPARATOR '; ') AS `film_info` FROM (((`sakila`.`actor` `a` LEFT JOIN `sakila`.`film_actor` `fa` ON ((`a`.`actor_id` = `fa`.`actor_id`))) LEFT JOIN `sakila`.`film_category` `fc` ON ((`fa`.`film_id` = `fc`.`film_id`))) LEFT JOIN `sakila`.`category` `c` ON ((`fc`.`category_id` = `c`.`category_id`))) GROUP BY `a`.`actor_id`,`a`.`first_name`,`a`.`last_name`

b.

sql;"> CREATE ALGORITHM = UNDEFINED DEFINER = `root`@`localhost` sql SECURITY DEFINER VIEW `sakila`.`staff_list` AS SELECT `s`.`staff_id` AS `ID`,CONCAT(`s`.`first_name`,_UTF8' ',`s`.`last_name`) AS `name`,`a`.`address` AS `address`,`a`.`postal_code` AS `zip code`,`a`.`phone` AS `phone`,`sakila`.`city`.`city` AS `city`,`sakila`.`country`.`country` AS `country`,`s`.`store_id` AS `SID` FROM (((`sakila`.`staff` `s` JOIN `sakila`.`address` `a` ON ((`s`.`address_id` = `a`.`address_id`))) JOIN `sakila`.`city` ON ((`a`.`city_id` = `sakila`.`city`.`city_id`))) JOIN `sakila`.`country` ON ((`sakila`.`city`.`country_id` = `sakila`.`country`.`country_id`)))

2.存储过程

a.

sql;"> CREATE DEFINER=`root`@`localhost` PROCEDURE `film_in_stock`(IN p_film_id INT,IN p_store_id INT,OUT p_film_count INT) READS sql DATA BEGIN SELECT inventory_id FROM inventory WHERE film_id = p_film_id AND store_id = p_store_id AND inventory_in_stock(inventory_id); SELECT FOUND_ROWS() INTO p_film_count; END

b.

0'; LEAVE proc; END IF; IF min_dollar_amount_purchased = 0.00 THEN SELECT 'Minimum monthly dollar amount purchased parameter must be > $0.00'; LEAVE proc; END IF; /* Determine start and end time periods */ SET last_month_start = DATE_SUB(CURRENT_DATE(),INTERVAL 1 MONTH); SET last_month_start = STR_TO_DATE(CONCAT(YEAR(last_month_start),'-',MONTH(last_month_start),'-01'),'%Y-%m-%d'); SET last_month_end = LAST_DAY(last_month_start); /* Create a temporary storage area for Customer IDs. */ CREATE TEMPORARY TABLE tmpCustomer (customer_id SMALLINT UNSIGNED NOT NULL PRIMARY KEY); /* Find all customers meeting the monthly purchase requirements */ INSERT INTO tmpCustomer (customer_id) SELECT p.customer_id FROM payment AS p WHERE DATE(p.payment_date) BETWEEN last_month_start AND last_month_end GROUP BY customer_id HAVING SUM(p.amount) > min_dollar_amount_purchased AND COUNT(customer_id) > min_monthly_purchases; /* Populate OUT parameter with count of found customers */ SELECT COUNT(*) FROM tmpCustomer INTO count_rewardees; /* Output ALL customer information of matching rewardees. Customize output as needed. */ SELECT c.* FROM tmpCustomer AS t INNER JOIN customer AS c ON t.customer_id = c.customer_id; /* Clean up */ DROP TABLE tmpCustomer; END

3.函数

a.

sql;"> CREATE DEFINER=`root`@`localhost` FUNCTION `get_customer_balance`(p_customer_id INT,p_effective_date DATETIME) RETURNS decimal(5,2) READS sql DATA DETERMINISTIC BEGIN #OK,WE NEED TO CALCULATE THE CURRENT BALANCE GIVEN A CUSTOMER_ID AND A DATE #THAT WE WANT THE BALANCE TO BE EFFECTIVE FOR. THE BALANCE IS: # 1) RENTAL FEES FOR ALL PREVIoUS RENTALS # 2) ONE DOLLAR FOR EVERY DAY THE PREVIoUS RENTALS ARE OVERDUE # 3) IF A FILM IS MORE THAN RENTAL_DURATION * 2 OVERDUE,CHARGE THE REPLACEMENT_COST # 4) SUBTRACT ALL PAYMENTS MADE BEFORE THE DATE SPECIFIED DECLARE v_rentfees DECIMAL(5,2); #FEES PAID TO RENT THE VIDEOS INITIALLY DECLARE v_overfees INTEGER; #LATE FEES FOR PRIOR RENTALS DECLARE v_payments DECIMAL(5,2); #SUM OF PAYMENTS MADE PREVIoUSLY SELECT IFNULL(SUM(film.rental_rate),0) INTO v_rentfees FROM film,inventory,rental WHERE film.film_id = inventory.film_id AND inventory.inventory_id = rental.inventory_id AND rental.rental_date <= p_effective_date AND rental.customer_id = p_customer_id; SELECT IFNULL(SUM(IF((TO_DAYS(rental.return_date) - TO_DAYS(rental.rental_date)) > film.rental_duration,((TO_DAYS(rental.return_date) - TO_DAYS(rental.rental_date)) - film.rental_duration),0)),0) INTO v_overfees FROM rental,film WHERE film.film_id = inventory.film_id AND inventory.inventory_id = rental.inventory_id AND rental.rental_date <= p_effective_date AND rental.customer_id = p_customer_id; SELECT IFNULL(SUM(payment.amount),0) INTO v_payments FROM payment WHERE payment.payment_date <= p_effective_date AND payment.customer_id = p_customer_id; RETURN v_rentfees + v_overfees - v_payments; END

b.

0 THEN RETURN FALSE; ELSE RETURN TRUE; END IF; END

以上所述是小编给大家介绍的MysqL 5.7 create VIEW or FUNCTION or PROCEDURE,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对编程之家网站的支持

原文链接:https://www.f2er.com/mssql/62782.html

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