這是一種關系劃分操作。你可以使用NOT EXISTS條款的組合來做到這一點，例如：

SELECT a.ID AS ID1

,b.ID AS ID2

FROM (SELECT DISTINCT ID FROM mytable) a

,(SELECT DISTINCT ID FROM mytable) b

WHERE a.ID < b.ID

AND NOT EXISTS

( SELECT a2.Like

FROM mytable a2

WHERE a.ID = a2.ID

MINUS

SELECT b2.Like

FROM mytable b2

WHERE b.ID = b2.ID

)

AND NOT EXISTS

( SELECT b2.Like

FROM mytable b2

WHERE b.ID = b2.ID

MINUS

SELECT a2.Like

FROM mytable a2

WHERE a.ID = a2.ID

);

ID1 ID2

=== ===

p1 p3

p2 p4

總結

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