Last Updated
：2025/12/04
left outer join
Noun
Japanese Meaning
左外部結合：データベースにおける結合方法の一つで、左右のテーブルのうち、左側のテーブルのすべての行を結果に含め、右側のテーブルとの結合条件に合致しない場合は右側の値がNULLとなる結合方式です。
（ plural ）
Quizzes for review
(databases) A join yielding a set of records for two tables, where all rows of the left
table are enlisted with all rows of the right
table, even if the join condition does not find any matching row on the right
.
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See correct answer
left outer join
To ensure all customers are listed even if they have no orders, the report uses a left outer join between the customers and orders tables.
See correct answer
To ensure all customers are listed even if they have no orders, the report uses a left outer join between the customers and orders tables.
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