What is TRUE about UPDATE in SQL VIEW?*Views that depend on a single table can be updated.An update of a view created from more than one table will not be allowed by SQL.There should be no NULL values in the fields of view.All of the above
Question
What is TRUE about UPDATE in SQL VIEW?*Views that depend on a single table can be updated.An update of a view created from more than one table will not be allowed by SQL.There should be no NULL values in the fields of view.All of the above
Solution
All of the above statements are true about UPDATE in SQL VIEW.
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Views that depend on a single table can be updated: This is true because a view is essentially a stored query. If the view is based on one table, you can update the view and it will update the underlying table.
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An update of a view created from more than one table will not be allowed by SQL: This is generally true because SQL doesn't know how to handle updates to views that are based on multiple tables. It doesn't know which table to update, or how to handle conflicts between the tables.
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There should be no NULL values in the fields of view: This is true because NULL values can cause problems when updating views. If a field in a view is NULL, SQL doesn't know what value to use when updating that field.
Similar Questions
Can a view be updated?Yes, but only if it's based on a single table.Yes, regardless of the number of tables it's based on.No, views are read-only.It depends on the database system.
Question 1Which of the following statements about views is correct?1 pointYou cannot change data in the base tables through a view.When you define a view, only the definition of the view is stored, not the data that it represents.A view can only represent data from a single table.A view is an independent copy of a single table’s structure, including the data.
Question : SQL Views are also known as
When SELECT statements used to create Views contain ____ clauses, the views cannot be updated.*JOINHAVINGGROUP BYAll of the above
Why might you use a view in SQL?To hide complexity.To ensure data integrity.To improve query performance.All of the above.
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