MySQL練習(xí)九：查找最晚入職員工的所有信息

有一個(gè)員工employees表簡(jiǎn)況如下:

請(qǐng)你查找employees里最晚入職員工的所有信息，以上例子輸出如下:

對(duì)應(yīng)SQL語(yǔ)句:

1. DDL

drop table if exists  `employees` ; 
CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));

2. insert 語(yǔ)句

INSERT INTO employees VALUES(10001,'1953-09-02','Georgi','Facello','M','1986-06-26');
INSERT INTO employees VALUES(10002,'1964-06-02','Bezalel','Simmel','F','1985-11-21');
INSERT INTO employees VALUES(10003,'1959-12-03','Parto','Bamford','M','1986-08-28');
INSERT INTO employees VALUES(10004,'1954-05-01','Chirstian','Koblick','M','1986-12-01');
INSERT INTO employees VALUES(10005,'1955-01-21','Kyoichi','Maliniak','M','1989-09-12');
INSERT INTO employees VALUES(10006,'1953-04-20','Anneke','Preusig','F','1989-06-02');
INSERT INTO employees VALUES(10007,'1957-05-23','Tzvetan','Zielinski','F','1989-02-10');
INSERT INTO employees VALUES(10008,'1958-02-19','Saniya','Kalloufi','M','1994-09-15');
INSERT INTO employees VALUES(10009,'1952-04-19','Sumant','Peac','F','1985-02-18');
INSERT INTO employees VALUES(10010,'1963-06-01','Duangkaew','Piveteau','F','1989-08-24');
INSERT INTO employees VALUES(10011,'1953-11-07','Mary','Sluis','F','1990-01-22');

參考答案:

SELECT * FROM employees where  hire_date = (SELECT hire_date from employees  order by hire_date desc LIMIT 0, 1);

試題解析:

1. 首先明白此題是查詢最晚入職的員工，我們直接根據(jù)入職日期做一個(gè)倒序即可。

2. 倒序得到最晚的入職日期，在到用戶表去查詢?nèi)掌诘扔谠撊掌诩纯伞?/p>

3. 此題很容易遺漏，同一天入職的員工不止一個(gè)，會(huì)存在多個(gè)情況。

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