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13 lines
256 B
SQL
13 lines
256 B
SQL
SELECT f1.person2, f2.person2
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FROM (
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SELECT * FROM FriendshipSymmetric WHERE person1 = <id>
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) f1
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JOIN ON
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(
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SELECT * FROM FriendshipSymmetric WHERE person1 = <id>
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) f2
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EXCEPT
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(
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SELECT * FROM FriendshipSymmetric
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)
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WHERE f1.person2 != f2.person2
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