LaTeX-examples/documents/musterloesung-db-2012-09-24/d2c2.sql

SELECT f1.person2, f2.person2 
FROM (
    SELECT person2 FROM FriendshipSymmetric WHERE person1 = <id>
) f1
JOIN ON
(
    SELECT person2 FROM FriendshipSymmetric WHERE person1 = <id>
) f2
EXCEPT
(
    SELECT * FROM FriendshipSymmetric
)
WHERE f1.person2 != f2.person2
db getext 2013-07-27 17:14:28 +02:00			`SELECT f1.person2, f2.person2`
			`FROM (`
			`SELECT person2 FROM FriendshipSymmetric WHERE person1 = <id>`
			`) f1`
			`JOIN ON`
			`(`
Fixed a copy paste errors and filtered out all edges with form (x,x) Before, there were edges in this form (x,x) included but they shouldn't be included. 2013-07-27 19:42:28 +02:00			`SELECT person2 FROM FriendshipSymmetric WHERE person1 = <id>`
db getext 2013-07-27 17:14:28 +02:00			`) f2`
			`EXCEPT`
			`(`
			`SELECT * FROM FriendshipSymmetric`
			`)`
Fixed a copy paste errors and filtered out all edges with form (x,x) Before, there were edges in this form (x,x) included but they shouldn't be included. 2013-07-27 19:42:28 +02:00			`WHERE f1.person2 != f2.person2`