新人作业task6

1、返回驾驶所有飞行员的工资都高于80000的飞机

SELECT aname FROM aircraft 
WHERE aid != ALL(SELECT DISTINCT aid FROM certified 
WHERE eid = ANY(SELECT eid FROM employees 
WHERE salary<=80000 ) ) ;

2、返回能驾驶3种以上飞机的飞行员名字，和他们座驾的最大航程。

SELECT eid,MAX(crusingrange) FROM
 ( SELECT * FROM certified GROUP BY eid HAVING COUNT(eid)>3 )AS A 
INNER JOIN 
aircraft 
ON A.aid=aircraft.aid 
GROUP BY eid;

3.返回工资比从洛杉矶到火奴鲁鲁的最低票价还低的飞行员名字。

SELECT ename FROM employees 
WHERE eid= ANY(SELECT DISTINCT eid FROM certified ) &&
 salary<( SELECT MIN(price) FROM flights 
WHERE origin='Los Angeles' && destination='Honolulu' ) ;

4、对于所有航程大于1000的飞机，找出飞机名字和平均薪水。

SELECT A.aname, ROUND(B.AVGsalary,2) AS AverageSalary FROM
( SELECT aid,aname FROM aircraft WHERE crusingrange > 1000 ) AS A 
INNER JOIN
( SELECT certified.aid,AVG(employees.salary) AS AVGsalary FROM 
 certified INNER JOIN employees 
 ON certified.eid = employees.eid GROUP BY certified.aid) AS B 
ON A.aid=B.aid ;

5、返回能驾驶Boeing飞机的飞行员的名字

SELECT DISTINCT ename 
FROM employees 
WHERE eid=ANY (SELECT eid FROM certified 
WHERE aid= ANY( SELECT aid FROM aircraft 
WHERE aname LIKE 'Boeing%') ) ;

6、找出适用于洛杉矶到芝加哥航线的所有飞机的id。

SELECT aid FROM aircraft 
WHERE crusingrange > ANY(SELECT distance FROM flights 
WHERE origin='Los Angeles' && destination='Chicago') ;

7、返回工资大于100000的飞行员飞行的航线（不知道是每个飞行员都要找航线，还是把所有有飞行员经过的航线都找出来）

SELECT origin,destination FROM flights 
WHERE distance > ANY ( SELECT crusingrange FROM aircraft 
WHERE aid = ANY(SELECT aid FROM certified 
WHERE eid= ANY( SELECT eid FROM employees 
WHERE salary>100000 )))  ;

8、返回能驾驶3000航程以上的飞机但不能开波音飞机的飞行员。

SELECT ename FROM employees WHERE 
eid != ANY( SELECT eid FROM certified 
WHERE aid= ANY(SELECT aid FROM aircraft WHERE aname LIKE 'Boeing%' )) && 
eid =  ANY( SELECT eid FROM certified 
WHERE aid= ANY(SELECT aid FROM aircraft WHERE crusingrange>3000)) ;

9、导入数据库的时候，时间没被导入进来····
10、查找飞行员和所有人的平均工资差距。

SELECT ROUND(AVG(salary),2)-(SELECT ROUND(AVG(salary),2) FROM employees ) 
AS salaryDifference FROM employees WHERE eid = ANY( SELECT eid FROM certified ) ;

11、查找工资比飞行员平均工资高 的非飞行员的名字和工资

SELECT ename,salary FROM employees 
WHERE eid != ANY( SELECT eid FROM certified ) &&
salary > (SELECT AVG(salary) FROM employees 
WHERE eid= ANY( SELECT eid FROM certified) )  ;

12、查找只能驾驶航程在1000以上的飞行员名字。

SELECT ename FROM employees WHERE 
eid != ALL(SELECT eid FROM certified WHERE 
aid= ANY(SELECT aid FROM aircraft WHERE crusingrange<1000 ) ) &&
eid = ANY(SELECT eid FROM certified) ;

13、只能驾驶航程在1000以上，且能驾驶两辆以上飞机的飞行员的名字。

SELECT ename FROM employees WHERE 
eid != ALL(SELECT eid FROM certified WHERE 
aid= ANY(SELECT aid FROM aircraft WHERE crusingrange<1000 ) ) &&
eid = ANY(SELECT eid FROM certified GROUP BY eid HAVING COUNT(aid)>=2 ) ;

14、只能驾驶航程在1000以上的波音飞机的飞行员名字。

SELECT ename FROM employees WHERE 
eid != ALL(SELECT eid FROM certified 
WHERE aid= ANY(SELECT aid FROM aircraft WHERE crusingrange<1000 ) ) &&
eid = ANY(SELECT eid FROM certified 
WHERE aid= ANY(SELECT aid FROM aircraft WHERE aname LIKE 'Boeing%' )) ;