Determine how many books have been ordered for authors who have more than one book listed in the Books table. : Sort Order « Select Clause « SQL / MySQL

1. SQL / MySQL
2. Select Clause
3. Sort Order

Determine how many books have been ordered for authors who have more than one book listed in the Books table.

       
mysql>
mysql>
mysql> CREATE TABLE Books
    -> (
    ->     BookID SMALLINT NOT NULL PRIMARY KEY,
    ->     BookTitle VARCHAR(60) NOT NULL,
    ->     Copyright YEAR NOT NULL
    -> )
    -> ENGINE=INNODB;
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO Books VALUES
    -> (12786, 'Notebook', 1934),
    -> (13331, 'C++', 1919),
    -> (14356, 'Opera', 1966),
    -> (15729, 'Sql Server', 1932),
    -> (16284, 'C', 1996),
    -> (17695, 'Pascal', 1980),
    -> (19264, 'Postcards', 1992),
    -> (19354, 'Oracle', 1993);
Query OK, 8 rows affected (0.00 sec)
Records: 8  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> CREATE TABLE Authors
    -> (
    ->     AuthID SMALLINT NOT NULL PRIMARY KEY,
    ->     AuthFN VARCHAR(20),
    ->     AuthMN VARCHAR(20),
    ->     AuthLN VARCHAR(20)
    -> )
    -> ENGINE=INNODB;
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO Authors VALUES
    -> (1006, 'Hunter', 'S.', 'Thompson'),
    -> (1007, 'Joyce', 'Carol', 'Oates'),
    -> (1008, 'Black', NULL, 'Elk'),
    -> (1009, 'Rainer', 'Maria', 'Rilke'),
    -> (1010, 'John', 'Kennedy', 'Toole'),
    -> (1011, 'John', 'G.', 'Neihardt'),
    -> (1012, 'Annie', NULL, 'Proulx'),
    -> (1013, 'Alan', NULL, 'Watts'),
    -> (1014, 'Nelson', NULL, 'Algren');
Query OK, 9 rows affected (0.00 sec)
Records: 9  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> CREATE TABLE AuthorBook
    -> (
    ->     BookID SMALLINT NOT NULL,
    ->     AuthID SMALLINT NOT NULL,
    ->     PRIMARY KEY (AuthID, BookID)
    -> )
    -> ENGINE=INNODB;
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO AuthorBook VALUES
    -> (1006, 14356),
    -> (1008, 15729),
    -> (1009, 12786),
    -> (1010, 17695),
    -> (1011, 15729),
    -> (1012, 19264),
    -> (1012, 19354),
    -> (1014, 16284);
Query OK, 8 rows affected (0.00 sec)
Records: 8  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql>
mysql> CREATE TABLE BookOrders
    -> (
    ->     OrderID SMALLINT NOT NULL,
    ->     BookID SMALLINT NOT NULL,
    ->     Quantity SMALLINT NOT NULL,
    ->     PRIMARY KEY (OrderID, BookID),
    ->     FOREIGN KEY (BookID) REFERENCES Books (BookID)
    -> )
    -> ENGINE=INNODB;
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql>
mysql> INSERT INTO BookOrders VALUES
    -> (101, 13331, 1),
    -> (101, 12786, 1),
    -> (101, 16284, 2),
    -> (102, 19354, 1),
    -> (102, 15729, 3),
    -> (103, 12786, 2), (103, 19264, 1), (103, 13331, 1),
    -> (103, 14356, 2), (104, 19354, 1), (105, 15729, 1), (105, 14356, 2),
    -> (106, 16284, 2), (106, 13331, 1), (107, 12786, 3), (108, 19354, 1),
    -> (108, 16284, 4), (109, 15729, 1), (110, 13331, 2), (110, 12786, 2),
    -> (110, 14356, 2), (111, 14356, 2);
Query OK, 22 rows affected (0.00 sec)
Records: 22  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> SELECT BookID, SUM(Quantity) AS Total
    -> FROM BookOrders
    -> GROUP BY BookID
    -> HAVING BookID IN
    -> (SELECT BookID FROM AuthorBook WHERE AuthID IN
    -> (
    -> SELECT AuthID FROM AuthorBook
    -> GROUP BY AuthID
    -> HAVING COUNT(*)>1
    -> )
    -> );
Empty set (0.00 sec)

mysql>
mysql>
mysql> drop table BookOrders;
Query OK, 0 rows affected (0.00 sec)

mysql> drop table AuthorBook;
Query OK, 0 rows affected (0.00 sec)

mysql> drop table Books;
Query OK, 0 rows affected (0.00 sec)

mysql> drop table Authors;
Query OK, 0 rows affected (0.00 sec)

mysql>

   
    
    
    
    
    
    
  

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