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SQL for Database Construction

SQL for Database Construction
For what purposes are views used?

All of these
To hide rows only
To hide columns only
To hide complicated SQL statements only

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SQL for Database Construction
A updatable view has its own data.

True
False

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SQL for Database Construction
There are three SQL data modification operations: insert, modify and delete.

True
False

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SQL for Database Construction
To update an SQL view, the DBMS must be able to associate the column(s) to be updated with:

a particular column in a particular row.
a particular column in a particular underlying table.
None of these
a particular row in a particular underlying table.

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SQL for Database Construction
SQL views can be used to hide:

both of the above can be hidden by an SQL view.
complicated SQL syntax only.
None of these
columns and rows only.

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SQL for Database Construction
SQL Server does not support the BEFORE trigger.

False
True

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