noun
self-association
Computing term for an entity associating with itself, such as a self-referential relationship in a database or a self-join in SQL.
データベースで自己結合を使うと、同じテーブル内の行同士を比較できる。
Using a self-join in a database allows you to compare rows within the same table.
自己相関 is autocorrelation in statistics, while 自己結合 is self-association or self-join in computing.
Compound of 自己 (self) and 結合 (association, join), likely a calque from English 'self-join' or 'self-association'.