MySQL Tutorial/Select Query/NOT EXISTS

NOT Exist with subquery

   <source lang="sql">

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 (0.05 sec) mysql> mysql> mysql> INSERT INTO Books VALUES (12786, "Java", 1934),

   ->                          (13331, "MySQL",          1919),
   ->                          (14356, "PHP",            1966),
   ->                          (15729, "PERL",           1932),
   ->                          (16284, "Oracle",         1996),
   ->                          (17695, "Pl/SQL",         1980),
   ->                          (19264, "JavaScript",     1992),
   ->                          (19354, "www.sqle.ru", 1993);

Query OK, 8 rows affected (0.03 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 (0.09 sec) mysql> mysql> mysql> INSERT INTO Authors VALUES (1006, "H", "S.", "T"),

   ->                            (1007, "J", "C",  "O"),
   ->                            (1008, "B", NULL, "E"),
   ->                            (1009, "R", "M",  "R"),
   ->                            (1010, "J", "K",  "T"),
   ->                            (1011, "J", "G.", "N"),
   ->                            (1012, "A", NULL, "P"),
   ->                            (1013, "A", NULL, "W"),
   ->                            (1014, "N", NULL, "A");

Query OK, 9 rows affected (0.03 sec) Records: 9 Duplicates: 0 Warnings: 0 mysql> mysql> mysql> CREATE TABLE AuthorBook(

   ->    AuthID SMALLINT NOT NULL,
   ->    BookID SMALLINT NOT NULL,
   ->    PRIMARY KEY (AuthID, BookID),
   ->    FOREIGN KEY (AuthID) REFERENCES Authors (AuthID),
   ->    FOREIGN KEY (BookID) REFERENCES Books (BookID)
   -> )
   -> ENGINE=INNODB;

Query OK, 0 rows affected (0.09 sec) mysql> 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 (0.03 sec) Records: 8 Duplicates: 0 Warnings: 0 mysql> mysql> mysql> select * from Authors; +--------+--------+--------+--------+ | AuthID | AuthFN | AuthMN | AuthLN | +--------+--------+--------+--------+ | 1006 | H | S. | T | | 1007 | J | C | O | | 1008 | B | NULL | E | | 1009 | R | M | R | | 1010 | J | K | T | | 1011 | J | G. | N | | 1012 | A | NULL | P | | 1013 | A | NULL | W | | 1014 | N | NULL | A | +--------+--------+--------+--------+ 9 rows in set (0.00 sec) mysql> select * from Books; +--------+----------------+-----------+ | BookID | BookTitle | Copyright | +--------+----------------+-----------+ | 12786 | Java | 1934 | | 13331 | MySQL | 1919 | | 14356 | PHP | 1966 | | 15729 | PERL | 1932 | | 16284 | Oracle | 1996 | | 17695 | Pl/SQL | 1980 | | 19264 | JavaScript | 1992 | | 19354 | www.sqle.ru | 1993 | +--------+----------------+-----------+ 8 rows in set (0.00 sec) mysql> select * from AuthorBook; +--------+--------+ | AuthID | BookID | +--------+--------+ | 1009 | 12786 | | 1006 | 14356 | | 1008 | 15729 | | 1011 | 15729 | | 1014 | 16284 | | 1010 | 17695 | | 1012 | 19264 | | 1012 | 19354 | +--------+--------+ 8 rows in set (0.00 sec) mysql> mysql> mysql> SELECT BookID, BookTitle

   -> FROM Books AS b
   -> WHERE NOT EXISTS
   ->    (
   ->       SELECT BookID
   ->       FROM AuthorBook AS ab
   ->       WHERE b.BookID=ab.BookID
   ->    )
   -> ORDER BY BookTitle;

+--------+-----------+ | BookID | BookTitle | +--------+-----------+ | 13331 | MySQL | +--------+-----------+ 1 row in set (0.00 sec) mysql> mysql> drop table AuthorBook; Query OK, 0 rows affected (0.03 sec) mysql> drop table Books; Query OK, 0 rows affected (0.05 sec) mysql> drop table Authors; Query OK, 0 rows affected (0.05 sec)</source>