MySQL Tutorial/Select Query/IN — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
Admin (обсуждение | вклад) м (1 версия) |
(нет различий)
| |
Текущая версия на 09:50, 26 мая 2010
Содержание
NOT IN is an alias for <> ALL
mysql>
mysql>
mysql> CREATE TABLE Employee(
-> id int,
-> first_name VARCHAR(15),
-> last_name VARCHAR(15),
-> start_date DATE,
-> end_date DATE,
-> salary FLOAT(8,2),
-> city VARCHAR(10),
-> description VARCHAR(15)
-> );
Query OK, 0 rows affected (0.03 sec)
mysql>
mysql> create table job (
-> id int,
-> title VARCHAR(20)
-> );
Query OK, 0 rows affected (0.03 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values (1,"Jason", "Martin", "19960725", "20060725", 1234.56, "Toronto", "Programmer");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(2,"Alison", "Mathews", "19760321", "19860221", 6661.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(3,"James", "Smith", "19781212", "19900315", 6544.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(4,"Celia", "Rice", "19821024", "19990421", 2344.78, "Vancouver","Manager");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(5,"Robert", "Black", "19840115", "19980808", 2334.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(6,"Linda", "Green", "19870730", "19960104", 4322.78,"New York", "Tester");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(7,"David", "Larry", "19901231", "19980212", 7897.78,"New York", "Manager");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(8,"James", "Cat", "19960917", "20020415", 1232.78,"Vancouver", "Tester");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> insert into job (id, title) values (1,"Tester");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (2,"Accountant");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (3,"Developer");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (4,"Coder");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (5,"Director");
Query OK, 1 row affected (0.02 sec)
mysql> insert into job (id, title) values (6,"Mediator");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (7,"Proffessor");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (8,"Programmer");
Query OK, 1 row affected (0.00 sec)
mysql> insert into job (id, title) values (9,"Developer");
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> select * from job;
+------+------------+
| id | title |
+------+------------+
| 1 | Tester |
| 2 | Accountant |
| 3 | Developer |
| 4 | Coder |
| 5 | Director |
| 6 | Mediator |
| 7 | Proffessor |
| 8 | Programmer |
| 9 | Developer |
+------+------------+
9 rows in set (0.00 sec)
mysql> select * from Employee;
+------+------------+-----------+------------+------------+---------+-----------+-------------+
| id | first_name | last_name | start_date | end_date | salary | city | description |
+------+------------+-----------+------------+------------+---------+-----------+-------------+
| 1 | Jason | Martin | 1996-07-25 | 2006-07-25 | 1234.56 | Toronto | Programmer |
| 2 | Alison | Mathews | 1976-03-21 | 1986-02-21 | 6661.78 | Vancouver | Tester |
| 3 | James | Smith | 1978-12-12 | 1990-03-15 | 6544.78 | Vancouver | Tester |
| 4 | Celia | Rice | 1982-10-24 | 1999-04-21 | 2344.78 | Vancouver | Manager |
| 5 | Robert | Black | 1984-01-15 | 1998-08-08 | 2334.78 | Vancouver | Tester |
| 6 | Linda | Green | 1987-07-30 | 1996-01-04 | 4322.78 | New York | Tester |
| 7 | David | Larry | 1990-12-31 | 1998-02-12 | 7897.78 | New York | Manager |
| 8 | James | Cat | 1996-09-17 | 2002-04-15 | 1232.78 | Vancouver | Tester |
+------+------------+-----------+------------+------------+---------+-----------+-------------+
8 rows in set (0.02 sec)
mysql>
These two statements are the same:
mysql>
mysql> SELECT id FROM employee WHERE id <> ALL (SELECT id FROM job);
Empty set (0.00 sec)
mysql>
mysql> SELECT id FROM employee WHERE id NOT IN (SELECT id FROM job);
Empty set (0.01 sec)
mysql>
mysql>
mysql>
mysql>
mysql> drop table job;
Query OK, 0 rows affected (0.00 sec)
mysql> drop table Employee;
Query OK, 0 rows affected (0.02 sec)
mysql>
Using IN operator
mysql>
mysql> CREATE TABLE Topic(
-> TopicID SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> Name VARCHAR(50) NOT NULL,
-> InStock SMALLINT UNSIGNED NOT NULL,
-> OnOrder SMALLINT UNSIGNED NOT NULL,
-> Reserved SMALLINT UNSIGNED NOT NULL,
-> Department ENUM("Classical", "Popular") NOT NULL,
-> Category VARCHAR(20) NOT NULL,
-> RowUpdate TIMESTAMP NOT NULL
-> );
Query OK, 0 rows affected (0.03 sec)
mysql>
mysql>
mysql> INSERT INTO Topic (Name, InStock, OnOrder, Reserved, Department, Category) VALUES
-> ("Java", 10, 5, 3, "Popular", "Rock"),
-> ("JavaScript", 10, 5, 3, "Classical", "Opera"),
-> ("C Sharp", 17, 4, 1, "Popular", "Jazz"),
-> ("C", 9, 4, 2, "Classical", "Dance"),
-> ("C++", 24, 2, 5, "Classical", "General"),
-> ("Perl", 16, 6, 8, "Classical", "Vocal"),
-> ("Python", 2, 25, 6, "Popular", "Blues"),
-> ("Php", 32, 3, 10, "Popular", "Jazz"),
-> ("ASP.net", 12, 15, 13, "Popular", "Country"),
-> ("VB.net", 5, 20, 10, "Popular", "New Age"),
-> ("VC.net", 24, 11, 14, "Popular", "New Age"),
-> ("UML", 42, 17, 17, "Classical", "General"),
-> ("www.sqle.ru",25, 44, 28, "Classical", "Dance"),
-> ("Oracle", 32, 15, 12, "Classical", "General"),
-> ("Pl/SQL", 20, 10, 5, "Classical", "Opera"),
-> ("Sql Server", 23, 12, 8, "Classical", "General");
Query OK, 16 rows affected (0.00 sec)
Records: 16 Duplicates: 0 Warnings: 0
mysql>
mysql> select * from Topic;
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
| TopicID | Name | InStock | OnOrder | Reserved | Department | Category | RowUpdate |
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
| 1 | Java | 10 | 5 | 3 | Popular | Rock | 2007-07-23 19:09:47 |
| 2 | JavaScript | 10 | 5 | 3 | Classical | Opera | 2007-07-23 19:09:47 |
| 3 | C Sharp | 17 | 4 | 1 | Popular | Jazz | 2007-07-23 19:09:47 |
| 4 | C | 9 | 4 | 2 | Classical | Dance | 2007-07-23 19:09:47 |
| 5 | C++ | 24 | 2 | 5 | Classical | General | 2007-07-23 19:09:47 |
| 6 | Perl | 16 | 6 | 8 | Classical | Vocal | 2007-07-23 19:09:47 |
| 7 | Python | 2 | 25 | 6 | Popular | Blues | 2007-07-23 19:09:47 |
| 8 | Php | 32 | 3 | 10 | Popular | Jazz | 2007-07-23 19:09:47 |
| 9 | ASP.net | 12 | 15 | 13 | Popular | Country | 2007-07-23 19:09:47 |
| 10 | VB.net | 5 | 20 | 10 | Popular | New Age | 2007-07-23 19:09:47 |
| 11 | VC.net | 24 | 11 | 14 | Popular | New Age | 2007-07-23 19:09:47 |
| 12 | UML | 42 | 17 | 17 | Classical | General | 2007-07-23 19:09:47 |
| 13 | www.sqle.ru | 25 | 44 | 28 | Classical | Dance | 2007-07-23 19:09:47 |
| 14 | Oracle | 32 | 15 | 12 | Classical | General | 2007-07-23 19:09:47 |
| 15 | Pl/SQL | 20 | 10 | 5 | Classical | Opera | 2007-07-23 19:09:47 |
| 16 | Sql Server | 23 | 12 | 8 | Classical | General | 2007-07-23 19:09:47 |
+---------+----------------+---------+---------+----------+------------+----------+---------------------+
16 rows in set (0.00 sec)
mysql>
mysql> SELECT Name, Category, InStock
-> FROM Topic
-> WHERE Category IN ("Blues", "Jazz")
-> ORDER BY Name;
+---------+----------+---------+
| Name | Category | InStock |
+---------+----------+---------+
| C Sharp | Jazz | 17 |
| Php | Jazz | 32 |
| Python | Blues | 2 |
+---------+----------+---------+
3 rows in set (0.00 sec)
mysql>
mysql> drop table Topic;
Query OK, 0 rows affected (0.00 sec)
Using IN with subquery
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 (0.06 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 (0.05 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> SELECT BookTitle, Copyright
-> FROM Books
-> WHERE Copyright IN
-> (
-> SELECT b.copyright
-> FROM Books AS b JOIN AuthorBook AS ab USING (BookID)
-> JOIN Authors AS a USING (AuthID)
-> WHERE AuthLN="MySQL"
-> )
-> ORDER BY BookTitle;
Empty set (0.00 sec)
mysql>
mysql> drop table AuthorBook;
Query OK, 0 rows affected (0.02 sec)
mysql> drop table Books;
Query OK, 0 rows affected (0.06 sec)
mysql> drop table Authors;
Query OK, 0 rows affected (0.05 sec)
Using NOT IN with subquery
mysql>
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 (0.03 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 (0.01 sec)
mysql>
mysql> SELECT BookTitle, Copyright
-> FROM Books
-> WHERE Copyright NOT IN
-> (
-> SELECT b.copyright
-> FROM Books AS b JOIN AuthorBook AS ab USING (BookID)
-> JOIN Authors AS a USING (AuthID)
-> WHERE AuthLN="MySQL"
-> )
-> ORDER BY BookTitle;
+----------------+-----------+
| BookTitle | Copyright |
+----------------+-----------+
| Java | 1934 |
| JavaScript | 1992 |
| MySQL | 1919 |
| Oracle | 1996 |
| PERL | 1932 |
| PHP | 1966 |
| Pl/SQL | 1980 |
| www.sqle.ru | 1993 |
+----------------+-----------+
8 rows in set (0.00 sec)
mysql>
mysql>
mysql> drop table AuthorBook;
Query OK, 0 rows affected (0.00 sec)
mysql> drop table Books;
Query OK, 0 rows affected (0.06 sec)
mysql> drop table Authors;
Query OK, 0 rows affected (0.06 sec)