mysql> show databases;
--------------
show databases
--------------

+--------------------+
| Database           |
+--------------------+
| information_schema |
| innodb             |
| mydb               |
| mysql              |
| performance_schema |
+--------------------+
5 rows in set (0.03 sec)

mysql>

mysql> drop database adparker # Please do not actually run this!

mysql> use adparker;
Database changed

mysql> show tables;
--------------
show tables
--------------

Empty set (0.03 sec)

CREATE TABLE `products` (
`productID` char(10) NOT NULL,
PRIMARY KEY (`productID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `users` (
`userId` varchar(20) NOT NULL,
`profileName` varchar(255) NOT NULL,
PRIMARY KEY (`userID`)
)  ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `reviews` (
`reviewId` int(10) unsigned NOT NULL AUTO_INCREMENT,
`userId` char(14) NOT NULL,
`productId` char(10) NOT NULL,
`helpfulness` float DEFAULT NULL,
`helpful` int(3) DEFAULT NULL,
`total`	int(3) DEFAULT NULL,
`score`	int(1) DEFAULT NULL,
`ts` timestamp DEFAULT 0,
`summary` varchar(255) DEFAULT NULL,
`text` text DEFAULT NULL,
PRIMARY	KEY (`reviewId`),
UNIQUE KEY `user_product` (`userId`, `productId`),
KEY `productId`	(`productId`),
FOREIGN KEY (`productId`) REFERENCES `products`(`productId`),
FOREIGN KEY (`userId`) REFERENCES `users`(`userId`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

drop table <table_name>

mysql> show tables;
--------------
show tables
--------------

+--------------------+
| Tables_in_adparker |
+--------------------+
| products           |
| reviews            |
| users              |
+--------------------+
3 rows in set (0.03 sec)

mysql> LOAD DATA LOCAL INFILE 'products.tsv'
INTO TABLE products
FIELDS TERMINATED BY '\t' 
LINES TERMINATED BY '\r\n';

--------------
LOAD DATA LOCAL INFILE 'products.tsv'
INTO TABLE products
FIELDS TERMINATED BY '\t'
LINES TERMINATED BY '\r\n'
--------------

Query OK, 156 rows affected (0.07 sec)
Records: 156  Deleted: 0  Skipped: 0  Warnings: 0

mysql>

mysql> delete from products;

LOAD DATA LOCAL INFILE 'users.tsv' 
INTO TABLE users 
FIELDS TERMINATED BY '\t' 
ESCAPED BY '\\'  
LINES TERMINATED BY '\r\n' 
(userId, profileName);

LOAD DATA LOCAL INFILE 'reviews.tsv' 
INTO TABLE reviews 
FIELDS TERMINATED BY '\t' 
ESCAPED BY '\\'  
LINES TERMINATED BY '\r\n' 
(userId, productId, helpfulness, helpful, total, score, ts, summary, text);
--------------
LOAD DATA LOCAL INFILE 'reviews.tsv'
INTO TABLE reviews
FIELDS TERMINATED BY '\t'
ESCAPED BY '\\'
LINES TERMINATED BY '\r\n'
(userId, productId, helpfulness, helpful, total, score, ts, summary, text)
--------------

Query OK, 5507 rows affected (2.83 sec)
Records: 5554  Deleted: 0  Skipped: 47  Warnings: 0

mysql> select * from reviews limit 1000,2 \G
--------------
select * from reviews limit 1000,2
--------------

*************************** 1. row ***************************
   reviewId: 1001
     userId: A1YQ6QB2127AJ4
  productId: B0001G6PZC
helpfulness: 1
    helpful: 7
      total: 7
      score: 5
         ts: 2004-03-23 16:00:00
    summary: Tom Cruise Triumphs Again In This Great Movie
       text: "The Last Samarai" is one of the greatest films released in 2003, starring Tom Cruise and Ken Watanabe.  Its hardhitting impact is intense enough to keep audiences' eyes wide open through the whole movie.  Its written plot of a US soldier changing his life for the better in Japan is brilliant.  Despite the war themes, there are some great heartwarming scenes, namely when the US soldier starts healing his pains from his US war battles.  As he begins learning Japanese traditions, he begins learning more about himself, which plays a crutial part in the film.  As this develops, the drama also develops, which keeps audiences interested.  This allows the conflicts between the two sides to be brought out as brilliantly as it was.  His friends' life stories add an additional unique flavor.  The war scenes are uniquely intense.  Few other movies have thought of such original war scenery.  This teaches audiences that there is no one way to fight a war or to solve a conflict. <p>Its Oscar-nominated 1870's Japanese setting is flawless.  They prove that they did their research to construct such an elaborate set.  The war scenes are desplicted as brutal as they should thanks to the special effects.  The costumes are accurate from those times.  Such great background offers an improved sense of this masterpiece film.<p>Tom Cruise's underrated role as US soldier Nathan Algren is his best in years.  His two years of training to prepare for his role paid off.  He never loses his intense sense of emotion for a second.  The pain and agony expressed are as pure as if he actually lived it.  Ken Watanabe's Oscar-nominated role as Samarai leader Katsumoto rightfully places him in the spotlight.  This performance makes acting appear easy when it's actually the opposite.  He proves that he will become a big-name actor in the next following years.  All other actors also performed their roles beautifully.<p>"The Last Samarai" is great for those looking for a unique war movie with emotion.  This is sure to please many audiences.  This is destined to be a classic in the following years as it deserves.
*************************** 2. row ***************************
   reviewId: 1002
     userId: A3MJMDJ8N9S8Q8
  productId: B0001G6PZC
helpfulness: 1
    helpful: 7
      total: 7
      score: 5
         ts: 2003-12-26 16:00:00
    summary: Dances with Wolves, but not in a "slap in the face" way
       text: &#65533;The path to enlightenment is littered with the bodies of the ignorant.&#65533;<p>This movie was simply incredible.  The acting second to none, the story moving and flawless, the characters deep and passionate, a must see, again and again.<p>Hired to train the army of a Japan drowning in western influence, Nathan Algren (Tom Cruise), becomes captured by a band of &#65533;savage&#65533; samurai warriors led by Katsumoto (Ken Watanabe). In the months to come Algren embraces the code of the samurai and befriending his &#65533;savage&#65533; enemies to soon discover there is nothing savage about honor, duty, and respect.
2 rows in set (0.02 sec)

mysql> select * from users join reviews using(userId) where profileName = 'scifi'\G
--------------
select * from users join reviews using(userId) where profileName = 'scifi'
--------------

*************************** 1. row ***************************
     userId: A100Y8WSLFJN7Q
profileName: scifi
   reviewId: 128
  productId: B000063W1R
helpfulness: 0
    helpful: 0
      total: 1
      score: 5
         ts: 2012-08-17 17:00:00
    summary: Entertaining
       text: We were highly entertained. It is a very well made movie with good acting for the most part. Can't go wrong with it.
1 row in set (0.02 sec)

mysql> delete from users where profileName = 'scifi';
--------------
delete from users where profileName = 'scifi'
--------------

ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`adparker`.`reviews`, CONSTRAINT `reviews_ibfk_2` FOREIGN KEY (`userId`) REFERENCES `users` (`userId`))