SQL Fehler in Abfrage für "undefined" -Spalte (?)

Question

Oracle SQL sagt Fehler bei "AS Output" gegen Ende, aber ich kann nicht herausfinden, was ist falsch mit ihm. : S

ERROR at line 1: 
ORA-00933: SQL command not properly ended 

Answer 1

try this:

  SELECT Airplane.aid, Airplane.aname AS name, 
       AVG (worker.salary) AS avgSalary 
     FROM Aircraft Airplane INNER JOIN Certified IsCertified on 
        Airplane.aid = IsCertified.aid 
       INNER JOIN Employees worker on IsCertified.eid = worker.eid 
     WHERE Airplane.crusingrange > 1000 
      GROUP BY Airplane.aid, Airplane.aname 

Answer 2

Sie benötigen keinen Subselect. Diese Abfrage entspricht:

SELECT 
    Airplane.aname AS name, 
    AVG(worker.salary) AS avgSalary 
FROM Aircraft Airplane 
JOIN Certified IsCertified ON Airplane.aid = IsCertified.aid 
JOIN Employees worker ON IsCertified.eid = worker.eid 
WHERE Airplane.crusingrange > 1000 
GROUP BY Airplane.aid, Airplane.aname