Last Updated
：2025/11/22
primary key
Noun
Japanese Meaning
データベース設計において、候補キーの中から各行を一意に識別するために選ばれた列または列の組み合わせを指す。 / テーブル内の各レコードを特定するため、空でない候補キーの集合から選定された主たるキー。
（ plural ）
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(computing, databases) In the design of a database table, the primary key (abbreviated PK) is selected among the non-empty set of candidate keys. The PK is a column (or an irreducible group of columns) able to identify every row of the table.
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primary key
Ensure the primary key remains unique and non-null so each row in the table can be reliably identified.
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Ensure the primary key remains unique and non-null so each row in the table can be reliably identified.
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