Просмотр исходного текста страницы SQL/MySQL/Date Time/Year

==Date function: YEAR==



   
  <!-- start source code -->
   
    <source lang="sql">
/*
mysql> Drop table Bird;
Query OK, 0 rows affected (0.01 sec)
mysql> CREATE TABLE Bird (
    ->     name VARCHAR(20),
    ->     owner VARCHAR(20),
    ->     species VARCHAR(20),
    ->     sex CHAR(1),
    ->     birth DATE,
    ->     death DATE
    -> );
Query OK, 0 rows affected (0.04 sec)
mysql> INSERT INTO  Bird VALUES ("BlueBird","Joe","Car","f","1999-03-30",NULL);
Query OK, 1 row affected (0.01 sec)
mysql> INSERT INTO  Bird VALUES ("RedBird","Yin","Bus","m","1979-04-30",NULL);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO  Bird VALUES ("RedBird","Yin","Bus","m","1998-01-30",NULL);
Query OK, 1 row affected (0.00 sec)
mysql> select * from Bird;
+----------+-------+---------+------+------------+-------+
| name     | owner | species | sex  | birth      | death |
+----------+-------+---------+------+------------+-------+
| BlueBird | Joe   | Car     | f    | 1999-03-30 | NULL  |
| RedBird  | Yin   | Bus     | m    | 1979-04-30 | NULL  |
| RedBird  | Yin   | Bus     | m    | 1998-01-30 | NULL  |
+----------+-------+---------+------+------------+-------+
3 rows in set (0.00 sec)
mysql> /*how old each a Bird is*/
mysql> SELECT name, birth, CURDATE(),
    ->        (YEAR(CURDATE())-YEAR(birth))
    ->        - (RIGHT(CURDATE(),5)<RIGHT(birth,5))
    ->        AS age
    ->        FROM Bird ORDER BY name;
+----------+------------+------------+------+
| name     | birth      | CURDATE()  | age  |
+----------+------------+------------+------+
| BlueBird | 1999-03-30 | 2005-10-09 |    6 |
| RedBird  | 1979-04-30 | 2005-10-09 |   26 |
| RedBird  | 1998-01-30 | 2005-10-09 |    7 |
+----------+------------+------------+------+
3 rows in set (0.00 sec)

*/
Drop table Bird;
CREATE TABLE Bird (
    name VARCHAR(20), 
    owner VARCHAR(20),
    species VARCHAR(20), 
    sex CHAR(1), 
    birth DATE, 
    death DATE
);
  
INSERT INTO  Bird VALUES ("BlueBird","Joe","Car","f","1999-03-30",NULL);
INSERT INTO  Bird VALUES ("RedBird","Yin","Bus","m","1979-04-30",NULL);
INSERT INTO  Bird VALUES ("RedBird","Yin","Bus","m","1998-01-30",NULL);
  
select * from Bird;
  
/*how old each a Bird is*/

  
SELECT name, birth, CURDATE(),
       (YEAR(CURDATE())-YEAR(birth))
       - (RIGHT(CURDATE(),5)<RIGHT(birth,5))
       AS age
       FROM Bird ORDER BY name;
           
       </source>
    
   


==Retrieve year from a date==



   
  <!-- start source code -->
   
    <source lang="sql">
 SELECT YEAR(CURRENT_DATE); 
/*mysql>  SELECT YEAR(CURRENT_DATE);
+--------------------+
| YEAR(CURRENT_DATE) |
+--------------------+
|               2005 |
+--------------------+
1 row in set (0.00 sec)
*/
           
       </source>
    
   


==Use YEAR in where clause==



   
  <!-- start source code -->
   
    <source lang="sql">
/*
mysql> select * from employee_person;
+----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+
| id | address                             | phone   | email | birthday   | sex  | m_status | s_name          | children |
+----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+
|  1 | 200, Regina Street                  | 7176666 | net@hotmail.ru | 1971-04-26 | M    | Y        | Ane Regina      |     NULL |
|  2 | 1232 Alberta Road                   | 5553312 | jo@hotmail.ru | 1968-03-02 | M    | Y        | Jane Van        |        3 |
|  3 | 90 Potter A                         | 3331211 | gp@ymail.ru | 1967-09-22 | M    | N        | Sandhya Pil     |        2 |
|  4 | 202, Donna Street                   | 7176167 | twink@hotmail.ru | 1976-08-09 | F    | Y        | Manish Sha      |     NULL |
|  5 | Apartment #8, UBC, Van Street       | 8973242 | holy@ymail.ru | 1974-10-14 | F    | N        | NULL            |     NULL |
|  6 | 46 SFU Street                       | 6451234 | kill@el.ru | 1978-12-31 | M    | N        | NULL            |     NULL |
|  7 | 432 Mercury Ave                     | 7932232 | mac@hotmail.ru | 1966-08-21 | M    | Y        | Mary Shelly     |        3 |
|  8 | 8 Little YaleTown                   | 5442994 | edd@gmail.ru | 1975-01-14 | M    | N        | NULL            |     NULL |
|  9 | 64 Temp Road                        | 4327652 | nan@pmail.ru | 1969-05-19 | M    | Y        | Man Nanda       |        1 |
| 10 | 132 Metro House, Henry Street       | 5552376 | ra@hotmail.ru | 1968-07-06 | M    | N        | NULL            |     NULL |
| 11 | 1 Grace Town, Van Avenue            | 5433879 | soundofsilence@boxer.net | 1957-11-04 | M    | Y        | Muriel Lovelace |        4 |
| 12 | 97 Oakland Road                     | 5423311 | kingarthur@roundtable.org | 1968-02-15 | M    | Y        | Rina Brighton   |        3 |
| 13 | 543 Applegate Lane                  | 3434343 | levy@cmail.ru | 1968-09-03 | F    | Y        | Matt Shi        |        2 |
| 14 | 76 Fish Street                      | 7432433 | tink@email.ru | 1965-04-28 | M    | N        | NULL            |     NULL |
| 15 | 98 Gun Street                       | 6500787 | danny@fhardy.ru | 1966-06-23 | M    | Y        | Betty Cudly     |        3 |
| 16 | #5 Winnepag Homes                   | 5433243 | mike@cmail.ru | 1964-03-06 | M    | Y        | Stella Stevens  |        2 |
| 17 | 652 Devon Building, 6th Jade Avenue | 5537885 | mona@darling.ru | 1970-04-18 | F    | Y        | Edgar Alan      |        1 |
| 18 | Apartment #9, Together Towers       | 5476565 | odessey@hotmail.ru | 1973-10-09 | M    | N        | NULL            |     NULL |
| 19 | Apartment #9, West Towers           | 5476565 | jire@hotmail.ru | 1973-01-20 | M    | N        | NULL            |     NULL |
| 20 | 90 Yale Town                        | 7528326 | help@more.org | 1968-01-25 | F    | N        | NULL            |     NULL |
| 21 | 4329 Eucalyptus Avenue              | 4254863 | money@cold.ru | 1964-06-13 | M    | Y        | Ruby Richer     |        2 |
+----+-------------------------------------+---------+---------------------------+------------+------+----------+-----------------+----------+
21 rows in set (0.00 sec)
mysql> select id, birthday
    -> from employee_person
    -> where year(birthday) = 1972;
Empty set (0.00 sec)

*/
Drop table employee_person;
CREATE TABLE employee_person (
    id int unsigned not null primary key, 
    address varchar(60), 
    phone int, 
    email varchar(60), 
    birthday DATE, 
    sex ENUM("M", "F"), 
    m_status ENUM("Y","N"), 
    s_name varchar(40), 
    children int
);

INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name) values (1, "200, Regina Street", 7176666, "net@hotmail.ru", "1971-04-26", "M", "Y", "Ane Regina");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (2, "1232 Alberta Road", 5553312, "jo@hotmail.ru", "1968-03-02", "M", "Y", "Jane Van", 3);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (3, "90 Potter A", 3331211, "gp@ymail.ru", "1967-09-22", "M", "N", "Sandhya Pil", 2);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name) values (4, "202, Donna Street", 7176167, "twink@hotmail.ru", "1976-08-09", "F", "Y", "Manish Sha");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (5, "Apartment #8, UBC, Van Street", 8973242, "holy@ymail.ru", "1974-10-14", "F", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (6, "46 SFU Street", "6451234", "kill@el.ru", "1978-12-31", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (7, "432 Mercury Ave", 7932232, "mac@hotmail.ru", "1966-8-21", "M", "Y", "Mary Shelly", "3");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (8, "8 Little YaleTown", 5442994, "edd@gmail.ru", "1975-01-14", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (9, "64 Temp Road", 4327652, "nan@pmail.ru", "1969-05-19", "M", "Y", "Man Nanda", "1");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (10, "132 Metro House, Henry Street", 5552376, "ra@hotmail.ru", "1968-07-06", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (11, "1 Grace Town, Van Avenue", 5433879, "soundofsilence@boxer.net", "1957-11-04", "M", "Y", "Muriel Lovelace", "4");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (12, "97 Oakland Road", 5423311, "kingarthur@roundtable.org", "1968-02-15", "M", "Y", "Rina Brighton", 3);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (13, "543 Applegate Lane", 3434343, "levy@cmail.ru", "1968-09-03", "F", "Y", "Matt Shi", "2");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (14, "76 Fish Street", 7432433, "tink@email.ru", "1965-04-28", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (15, "98 Gun Street", 6500787, "danny@fhardy.ru", "1966-06-23", "M", "Y", "Betty Cudly", 3);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (16, "#5 Winnepag Homes", 5433243, "mike@cmail.ru", "1964-03-06", "M", "Y", "Stella Stevens", 2);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (17, "652 Devon Building, 6th Jade Avenue", 5537885, "mona@darling.ru", "1970-04-18", "F", "Y", "Edgar Alan", 1);
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (18, "Apartment #9, Together Towers", 5476565, "odessey@hotmail.ru", "1973-10-09", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (19, "Apartment #9, West Towers", 5476565, "jire@hotmail.ru", "1973-1-20", "M", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status) values (20, "90 Yale Town", 7528326, "help@more.org", "1968-01-25", "F", "N");
INSERT INTO employee_person (id, address, phone, email, birthday, sex, m_status, s_name, children) values (21, "4329 Eucalyptus Avenue", 4254863, "money@cold.ru", "1964-06-13", "M", "Y", "Ruby Richer", 2);
select * from employee_person;
select id, birthday
from employee_person
where year(birthday) = 1972;
           
       </source>