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11 lines
324 B
MySQL
11 lines
324 B
MySQL
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SELECT f1.person2, f2.person2
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FROM FriendshipSymmetric f1
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JOIN FriendshipSymmetric f2
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ON f1.person1 = f2.person1
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LEFT JOIN FriendshipSymmetric f3
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ON f1.person2 = f3.person1 AND f2.person2 = f3.person2
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WHERE f1.person2 != f2.person2
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AND f1.person1 = <id>
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AND p3.person1 IS NULL
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AND p3.person2 IS NULL
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