テクノロジ系 (Technology)

Glossary

Glossary
テクノロジ系 (Technology)Tested 1×

射影

しゃえい · Projection

A relational database operation that extracts only specified columns from a table. It contrasts with selection, which filters rows by a condition. In SQL it corresponds to listing the desired columns in the SELECT clause.

Past questions testing this term · 1 questions

  • 2022r04 #98関係データベースで管理している“従業員”表から,氏名の列だけを取り出す操作を何というか。 従業員 | 従業員番号 | 氏名 | 所属コード | | --- |…
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