Tricky join question
От | Tim Tassonis |
---|---|
Тема | Tricky join question |
Дата | |
Msg-id | 458BBD86.5030508@cubic.ch обсуждение исходный текст |
Ответы |
Re: Tricky join question
Re: Tricky join question |
Список | pgsql-general |
Hi all I have a join problem that seems to be too difficult for me to solve: I have: table person id integer, name varchar(32) data: 1,"Jack" 2,"Jill" 3,"Bob" table course id integer, name varchar(32) data: 1,"SQL Beginner" 2,"SQL Advanced" table person_course person_id number, course_id number data: (currently empty) Now, I would like to know for every person the courses they have taken. In mysql, the following statement: SELECT c.id, c.name, pc.person_id FROM person as p left outer join person_course as pc on p.id = pc.person_id right outer join course as c on pc.course_id = c.id where p.id = 2 order by 1; will get me the following result: +---+-----------------------------------------+----------+ | id| name | person_id| +---+-----------------------------------------+----------+ | 1 | SQL Beginner | | | 2 | SQL Advanced | | +---+-----------------------------------------+----------+ Can I get Postgres to give me the same result somehow? The above statement will return nothing at all under postgres. Bye Tim
В списке pgsql-general по дате отправления: