查詢動物的出生日期,名稱, 年齡(以年爲單位)

 

# ************************************************************
# Sequel Pro SQL dump
# Version 4541
#
# Host: 127.0.0.1 (MySQL 5.7.15)
# Database: menagerie
# Generation Time: 2019-08-31 04:15:19 +0000
# ************************************************************


/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
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# Dump of table pet
# ------------------------------------------------------------

DROP TABLE IF EXISTS `pet`;

CREATE TABLE `pet` (
  `name` varchar(20) CHARACTER SET latin1 DEFAULT NULL,
  `owner` varchar(20) CHARACTER SET latin1 DEFAULT NULL,
  `species` varchar(20) CHARACTER SET latin1 DEFAULT NULL,
  `sex` char(1) CHARACTER SET latin1 DEFAULT NULL,
  `birth` date DEFAULT NULL,
  `death` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

LOCK TABLES `pet` WRITE;
/*!40000 ALTER TABLE `pet` DISABLE KEYS */;

INSERT INTO `pet` (`name`, `owner`, `species`, `sex`, `birth`, `death`)
VALUES
	('Fluffy ','Harold ','cat','f','1993-02-04',NULL),
	('Claws','Gwen','cat','m','1994-03-17',NULL),
	('Buffy ','Harold','dog','f','1989-05-13',NULL),
	('Fang','Benny ','dog','m','1990-08-27',NULL),
	('Bowser','Diane ','dog','m','1989-08-31','1995-07-29'),
	('Chirpy','Gwen','bird','f','1998-09-11',NULL),
	('Whistler ','Gwen','bird',NULL,'1997-12-09',NULL),
	('Slim','Benny ','snack ','m','1996-04-29',NULL),
	('Puffball','Diane','hamster','f','1999-03-30',NULL);

/*!40000 ALTER TABLE `pet` ENABLE KEYS */;
UNLOCK TABLES;



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/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

 

-- 獲取名稱,日期,距今日有幾年 ,併案名稱排序
SELECT name,
       `birth`,
       Timestampdiff(year, birth, Curdate()) age
FROM   pet 
order by name;

-- 獲取動物名稱 ,日期,月份
SELECT name, birth, MONTH(birth) FROM pet;

注意:使用到了  Timestampdiff 函數 , curdate 函數 , YEAR 作爲單位