Sub query with IN command : In « Select Clause « SQL / MySQL

1. SQL / MySQL
2. Select Clause
3. In

Sub query with IN command

   
/*

mysql> SELECT ArticleTitle, Copyright
    -> FROM Articles
    -> WHERE Copyright IN
    ->    (
    ->       SELECT b.copyright
    ->       FROM Articles AS b JOIN AuthorArticle AS ab USING (ArticleID)
    ->          JOIN Authors AS a USING (AuthID)
    ->       WHERE AuthorLastName='Yin'
    ->    )
    -> ORDER BY ArticleTitle;
+--------------+-----------+
| ArticleTitle | Copyright |
+--------------+-----------+
| Conferences  |      1996 |
+--------------+-----------+
1 row in set (0.00 sec)


*/

Drop table Articles;
Drop table Authors;
Drop table AuthorArticle;



CREATE TABLE Articles (
   ArticleID SMALLINT NOT NULL PRIMARY KEY,
   ArticleTitle VARCHAR(60) NOT NULL,
   Copyright YEAR NOT NULL
)
ENGINE=INNODB;


INSERT INTO Articles VALUES (12786, 'How write a paper', 1934),
                            (13331, 'Publish a paper', 1919),
                            (14356, 'Sell a paper', 1966),
                            (15729, 'Buy a paper', 1932),
                            (16284, 'Conferences', 1996),
                            (17695, 'Journal', 1980),
                            (19264, 'Information', 1992),
                            (19354, 'AI', 1993);


CREATE TABLE Authors (
   AuthID SMALLINT NOT NULL PRIMARY KEY,
   AuthorFirstName VARCHAR(20),
   AuthorMiddleName VARCHAR(20),
   AuthorLastName VARCHAR(20)
)
ENGINE=INNODB;


INSERT INTO Authors VALUES (1006, 'Henry', 'S.', 'Thompson'),
                           (1007, 'Jason', 'Carol', 'Oak'),
                           (1008, 'James', NULL, 'Elk'),
                           (1009, 'Tom', 'M', 'Ride'),
                           (1010, 'Jack', 'K', 'Ken'),
                           (1011, 'Mary', 'G.', 'Lee'),
                           (1012, 'Annie', NULL, 'Peng'),
                           (1013, 'Alan', NULL, 'Wang'),
                           (1014, 'Nelson', NULL, 'Yin');


CREATE TABLE AuthorArticle (
   AuthID SMALLINT NOT NULL,
   ArticleID SMALLINT NOT NULL,
   PRIMARY KEY (AuthID, ArticleID),
   FOREIGN KEY (AuthID) REFERENCES Authors (AuthID),
   FOREIGN KEY (ArticleID) REFERENCES Articles (ArticleID)
)
ENGINE=INNODB;


INSERT INTO AuthorArticle VALUES (1006, 14356), 
                              (1008, 15729), 
                              (1009, 12786), 
                              (1010, 17695),
                              (1011, 15729), 
                              (1012, 19264), 
                              (1012, 19354), 
                              (1014, 16284);
  
SELECT ArticleTitle, Copyright
FROM Articles
WHERE Copyright IN
   (
      SELECT b.copyright
      FROM Articles AS b JOIN AuthorArticle AS ab USING (ArticleID)
         JOIN Authors AS a USING (AuthID)
      WHERE AuthorLastName='Yin'
   )
ORDER BY ArticleTitle;


           
         
    
    
  

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