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In the relational model, a view can be used OA, as the basis of a derived view OB, all of these O C. in the INTO line in an SQL INSERT command OD, in the FROM line of an SQL query

In the relational model, a view can be used OA, as the basis of a derived view OB, all of these O C. in the INTO line in an SQL INSERT command OD, in the FROM line of an SQL query

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### Understanding Views in the Relational Model #### Multiple Choice Question: **In the relational model, a view can be used** - **A.** as the basis of a derived view - **B.** all of these - **C.** in the INTO line in an SQL INSERT command - **D.** in the FROM line of an SQL query ### Explanation In relational database systems, a view is a virtual table based on the result-set of an SQL query. Here are the various ways a view can be utilized: - **As the basis of a derived view**: A view can be created from another view. This means you can base one view on another to create a more complex query that derives its data from the initial view. - **In the INTO line in an SQL INSERT command**: Although uncommon and dependent on specific SQL database management systems’ functionalities, certain systems allow inserting data into views. - **In the FROM line of an SQL query**: Views can be used like tables in SQL queries. You can SELECT from a view in the same way you SELECT from a table. The correct option is **B. all of these**, implying that in relational database models, views are versatile and can be used in various ways as illustrated. ### Diagram Explanation There is no diagram in the given image. The question is in text form, providing a multiple-choice question about the uses of views in relational database models.
Transcribed Image Text:### Understanding Views in the Relational Model #### Multiple Choice Question: **In the relational model, a view can be used** - **A.** as the basis of a derived view - **B.** all of these - **C.** in the INTO line in an SQL INSERT command - **D.** in the FROM line of an SQL query ### Explanation In relational database systems, a view is a virtual table based on the result-set of an SQL query. Here are the various ways a view can be utilized: - **As the basis of a derived view**: A view can be created from another view. This means you can base one view on another to create a more complex query that derives its data from the initial view. - **In the INTO line in an SQL INSERT command**: Although uncommon and dependent on specific SQL database management systems’ functionalities, certain systems allow inserting data into views. - **In the FROM line of an SQL query**: Views can be used like tables in SQL queries. You can SELECT from a view in the same way you SELECT from a table. The correct option is **B. all of these**, implying that in relational database models, views are versatile and can be used in various ways as illustrated. ### Diagram Explanation There is no diagram in the given image. The question is in text form, providing a multiple-choice question about the uses of views in relational database models.
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