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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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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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Related words
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。
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