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formattierung

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Martin Thoma 2013-07-30 13:00:26 +02:00
parent c3f55e2d1e
commit 3bb436e81a
4 changed files with 21 additions and 21 deletions
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13
documents/musterloesung-db-2012-09-24/d2c2.1.sql Normal file
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@ -0,0 +1,13 @@
SELECT f1.person2, f2.person2
FROM (
SELECT * FROM FriendshipSymmetric WHERE person1 = 4
) f1
JOIN
(
SELECT * FROM FriendshipSymmetric WHERE person1 = 4
) f2 ON f1.person1 = f2.person1
WHERE f1.person2 != f2.person2
AND NOT EXISTS
(
SELECT * FROM FriendshipSymmetric f WHERE f.person1 = f1.person2 AND f.person2 = f2.person2
)