SQL Join-Anweisung, Probleme

Question

Ich bin neu in SQL und daher nicht in der Lage, die JOIN-Anweisung für diese Abfrage zu verfassen.

Ich habe die folgenden zwei Tabellen

Teachers 

+-------------+-------------+------+-----+---------+----------------+ 
| Field  | Type  | Null | Key | Default | Extra   | 
+-------------+-------------+------+-----+---------+----------------+ 
| id   | int(11)  | NO | PRI | NULL | auto_increment | 
| first_name | varchar(30) | NO |  | NULL |    | 
| last_name | varchar(30) | NO |  | NULL |    | 
+-------------+-------------+------+-----+---------+----------------+ 

Courses 

+------------+-------------+------+-----+---------+----------------+ 
| Field  | Type  | Null | Key | Default | Extra   | 
+------------+-------------+------+-----+---------+----------------+ 
| id   | int(11)  | NO | PRI | NULL | auto_increment | 
| teacher_id | int(11)  | NO | MUL | NULL |    | 
| name  | varchar(30) | NO |  | NULL |    | 
+------------+-------------+------+-----+---------+----------------+ 

ich, dass given a course id the details of the teacher for the course is returned eine Java PreparedStatement Zeichenfolge abzufragen, um zu schreiben. Kann mir jemand beim Schreiben helfen?

Answer 1

SELECT t.* 
FROM courses c 
JOIN teachers t 
ON  t.id = c.teacher_id 
WHERE c.id = ? 

Answer 2

SELECT * 
FROM Courses 
INNER JOIN Teachers 
ON Courses.teacher_id=Teachers.id;