Question

I have attached the following script file

Q1) List the full name of members, their DETAIL_DAILYLATEFEE and the average of DETAIL_DAILYLATEFEE for all members whose DETAIL_DAILYLATEFEE is less than the average of all DETAIL_DAILYLATEFEE.
Your query MUST contain a subquery.
Your result should be as shown below. Note that each member is only listed once.
Required: AVG(DETAIL_DAILYLATEFEE)
CONCAT
DISTINCT
Restricted: GROUP BY

Q2) Management is also interested in finding out the age of their movies (i.e. how old the movies are) in number of years compared to the average age (in rounded number of years) of all movies in their stock. They want a report that lists information about the title, year, genre and how many 'Years Old' a movie is, for all movies that are newer than the average age (in rounded years) of all movies. (For example, if the average age of all movies is X, list all movies with age < X)  
Required:
ROUND(AVG(MOVIE_YEAR))
YEAR(NOW()) - MOVIE_YEAR

-- Comment the following two lines if creating database in Mimir or Bluenose
create schema if not exists DVD_vidrental;
use DVD_vidrental;

DROP TABLE IF EXISTS `detailrental`;
DROP TABLE IF EXISTS `rental`;
DROP TABLE IF EXISTS `video`;
DROP TABLE IF EXISTS `movie`;
DROP TABLE IF EXISTS `price`;
DROP TABLE IF EXISTS `membership`;

CREATE TABLE `membership` (
`MEM_NUM` decimal(8,0) NOT NULL,
`MEM_FNAME` varchar(30) NOT NULL,
`MEM_LNAME` varchar(30) NOT NULL,
`MEM_STREET` varchar(120) DEFAULT NULL,
`MEM_CITY` varchar(50) DEFAULT NULL,
`MEM_STATE` char(2) DEFAULT NULL,
`MEM_ZIP` char(5) DEFAULT NULL,
`MEM_BALANCE` decimal(10,2) DEFAULT NULL,
PRIMARY KEY (`MEM_NUM`)
);

CREATE TABLE `price` (
`PRICE_CODE` decimal(2,0) NOT NULL,
`PRICE_DESCRIPTION` varchar(20) NOT NULL,
`PRICE_RENTFEE` decimal(5,2) DEFAULT NULL,
`PRICE_DAILYLATEFEE` decimal(5,2) DEFAULT NULL,
PRIMARY KEY (`PRICE_CODE`)
);

CREATE TABLE `movie` (
`MOVIE_NUM` decimal(8,0) NOT NULL,
`MOVIE_TITLE` varchar(75) NOT NULL,
`MOVIE_YEAR` decimal(4,0) DEFAULT NULL,
`MOVIE_COST` decimal(5,2) DEFAULT NULL,
`MOVIE_GENRE` varchar(50) DEFAULT NULL,
`PRICE_CODE` decimal(2,0) DEFAULT NULL,
PRIMARY KEY (`MOVIE_NUM`),
KEY `PRICE_CODE` (`PRICE_CODE`),
CONSTRAINT `movie_ibfk_1` FOREIGN KEY (`PRICE_CODE`) REFERENCES `price` (`PRICE_CODE`)
);

CREATE TABLE `video` (
`VID_NUM` decimal(8,0) NOT NULL,
`VID_INDATE` date DEFAULT NULL,
`MOVIE_NUM` decimal(8,0) DEFAULT NULL,
PRIMARY KEY (`VID_NUM`),
KEY `MOVIE_NUM` (`MOVIE_NUM`),
CONSTRAINT `video_ibfk_1` FOREIGN KEY (`MOVIE_NUM`) REFERENCES `movie` (`MOVIE_NUM`)
);

CREATE TABLE `rental` (
`RENT_NUM` decimal(8,0) NOT NULL,
`RENT_DATE` date DEFAULT NULL,
`MEM_NUM` decimal(8,0) DEFAULT NULL,
PRIMARY KEY (`RENT_NUM`),
KEY `MEM_NUM` (`MEM_NUM`),
CONSTRAINT `rental_ibfk_1` FOREIGN KEY (`MEM_NUM`) REFERENCES `membership` (`MEM_NUM`)
);

CREATE TABLE `detailrental` (
`RENT_NUM` decimal(8,0) NOT NULL,
`VID_NUM` decimal(8,0) NOT NULL,
`DETAIL_FEE` decimal(5,2) DEFAULT NULL,
`DETAIL_DUEDATE` date DEFAULT NULL,
`DETAIL_RETURNDATE` date DEFAULT NULL,
`DETAIL_DAILYLATEFEE` decimal(5,2) DEFAULT NULL,
PRIMARY KEY (`RENT_NUM`,`VID_NUM`),
KEY `VID_NUM` (`VID_NUM`),
CONSTRAINT `detailrental_ibfk_1` FOREIGN KEY (`RENT_NUM`) REFERENCES `rental` (`RENT_NUM`),
CONSTRAINT `detailrental_ibfk_2` FOREIGN KEY (`VID_NUM`) REFERENCES `video` (`VID_NUM`)
);

START TRANSACTION;

INSERT INTO `membership` VALUES (102,'TAMI','DAWSON','2632 TAKLI CIRCLE','NORENE','TN','37136',11.00),
(103,'CURT','KNIGHT','4025 CORNELL COURT','FLATGAP','KY','41219',6.00),
(104,'JAMAL','MELENDEZ','788 EAST 145TH AVENUE','QUEBECK','TN','38579',0.00),
(105,'IVA','MCCLAIN','6045 MUSKET BALL CIRCLE','SUMMIT','KY','42783',15.00),
(106,'MIRANDA','PARKS','4469 MAXWELL PLACE','GERMANTOWN','TN','38183',0.00),
(107,'ROSARIO','ELLIOTT','7578 DANNER AVENUE','COLUMBIA','TN','38402',5.00),
(108,'MATTIE','GUY','4390 EVERGREEN STREET','LILY','KY','40740',0.00),
(109,'CLINT','OCHOA','1711 ELM STREET','GREENEVILLE','TN','37745',10.00),
(110,'LEWIS','ROSALES','4524 SOUTHWIND CIRCLE','COUNCE','TN','38326',0.00),
(111,'STACY','MANN','2789 EAST COOK AVENUE','MURFREESBORO','TN','37132',8.00),
(112,'LUIS','TRUJILLO','7267 MELVIN AVENUE','HEISKELL','TN','37754',3.00),
(113,'MINNIE','GONZALES','6430 VASILI DRIVE','WILLISTON','TN','38076',0.00);

INSERT INTO `price` VALUES (1,'Standard',3.00,1.00),
(2,'New Release',4.50,3.00),(3,'Discount',2.50,1.00),
(4,'Weekly Special',2.00,0.50);
INSERT INTO `movie` VALUES (1234,'The Cesar Family Christmas',2014,39.95,'FAMILY',2),
(1235,'Smokey Mountain Wildlife',2011,59.95,'ACTION',3),(1236,'Richard Goodhope',2015,59.95,'DRAMA',2),
(1237,'Beatnik Fever',2014,29.95,'COMEDY',2),(1238,'Constant Companion',2015,89.95,'DRAMA',NULL),
(1239,'Where Hope Dies',2005,25.49,'DRAMA',3),(1245,'Time to Burn',2015,45.49,'ACTION',3),
(1246,'What He Doesn\'t Know',2013,58.29,'COMEDY',1);
INSERT INTO `video` VALUES (34341,'2014-01-22',1235),(34342,'2014-01-22',1235),
(34366,'2016-03-02',1236),(34367,'2016-03-02',1236),(34368,'2016-03-02',1236),
(34369,'2016-03-02',1236),(44392,'2015-10-21',1237),(44397,'2015-10-21',1237),
(54321,'2015-06-18',1234),(54324,'2015-06-18',1234),(54325,'2015-06-18',1234),
(59237,'2016-02-14',1237),(61353,'2013-01-28',1245),(61354,'2013-01-28',1245),
(61367,'2015-07-30',1246),(61369,'2015-07-30',1246),(61388,'2014-01-25',1239);
INSERT INTO `rental` VALUES (1001,'2016-03-01',103),(1002,'2016-03-01',105),
(1003,'2016-03-02',102),(1004,'2016-03-02',110),(1005,'2016-03-02',111),
(1006,'2016-03-02',107),(1007,'2016-03-02',104),(1008,'2016-03-03',105),(1009,'2016-03-03',111);
INSERT INTO `detailrental` VALUES (1001,34342,2.00,'2016-03-04','2016-03-02',NULL),
(1001,34366,3.50,'2016-03-04','2016-03-02',3.00),(1001,61353,2.00,'2016-03-04','2016-03-03',1.00),
(1002,59237,3.50,'2016-03-04','2016-03-04',3.00),(1003,54325,3.50,'2016-03-04','2016-03-09',3.00),
(1003,61369,2.00,'2016-03-06','2016-03-09',1.00),(1003,61388,0.00,'2016-03-06','2016-03-09',1.00),
(1004,34341,2.00,'2016-03-07','2016-03-07',1.00),(1004,34367,3.50,'2016-03-05','2016-03-07',3.00),
(1004,44392,3.50,'2016-03-05','2016-03-07',3.00),(1005,34342,2.00,'2016-03-07','2016-03-05',1.00),
(1005,44397,3.50,'2016-03-05','2016-03-05',3.00),(1006,34366,3.50,'2016-03-05','2016-03-04',3.00),
(1006,61367,2.00,'2016-03-07',NULL,1.00),(1007,34368,3.50,'2016-03-05',NULL,3.00),
(1008,34369,3.50,'2016-03-05','2016-03-05',3.00),
(1009,54324,3.50,'2016-03-05',NULL,3.00);

COMMIT;

Answer 1

Question 1:

SQL query :

select distinct(concat(MEM_FNAME,' ',MEM_LNAME)) as 'Member Name',DETAIL_DAILYLATEFEE,
(select avg(DETAIL_DAILYLATEFEE) from detailrental) as AVG_DETAIL_DAILYLATEFEE
from membership,rental ,detailrental
where
membership.MEM_NUM=rental.MEM_NUM and
rental.RENT_NUM=detailrental.RENT_NUM and
DETAIL_DAILYLATEFEE < (select avg(DETAIL_DAILYLATEFEE) from detailrental);

Explanation :

• This SQL query will join the three tables membership,rental ,detailrental
• and use the subquery to get the average of DETAIL_DAILYLATEFEE

Query result :

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Question 2:

SQL query :

select MOVIE_TITLE,MOVIE_YEAR,MOVIE_GENRE,YEAR(NOW()) - MOVIE_YEAR as YearsOld,
(select ROUND(AVG(YEAR(NOW()) - MOVIE_YEAR)) from movie) as AVGMOVIEAGE
from movie
group by MOVIE_TITLE,MOVIE_YEAR,MOVIE_GENRE
having YearsOld< AVGMOVIEAGE;

Explanation :

• This SQL query is using round(),YEAR() function and will return the result

Query result :

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